359 lines
14 KiB
C
359 lines
14 KiB
C
// RUN: %clang_cc1 %s -emit-llvm -o - -triple=armv5-unknown-freebsd -std=c11 | FileCheck %s
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// Test that we are generating atomicrmw instructions, rather than
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// compare-exchange loops for common atomic ops. This makes a big difference
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// on RISC platforms, where the compare-exchange loop becomes a ll/sc pair for
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// the load and then another ll/sc in the loop, expanding to about 30
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// instructions when it should be only 4. It has a smaller, but still
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// noticeable, impact on platforms like x86 and RISC-V, where there are atomic
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// RMW instructions.
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//
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// We currently emit cmpxchg loops for most operations on _Bools, because
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// they're sufficiently rare that it's not worth making sure that the semantics
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// are correct.
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typedef int __attribute__((vector_size(16))) vector;
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_Atomic(_Bool) b;
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_Atomic(int) i;
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_Atomic(long long) l;
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_Atomic(short) s;
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_Atomic(char*) p;
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_Atomic(float) f;
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_Atomic(vector) v;
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// CHECK: testinc
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void testinc(void)
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{
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// Special case for suffix bool++, sets to true and returns the old value.
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// CHECK: atomicrmw xchg i8* @b, i8 1 seq_cst
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b++;
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// CHECK: atomicrmw add i32* @i, i32 1 seq_cst
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i++;
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// CHECK: atomicrmw add i64* @l, i64 1 seq_cst
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l++;
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// CHECK: atomicrmw add i16* @s, i16 1 seq_cst
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s++;
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// Prefix increment
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// Special case for bool: set to true and return true
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// CHECK: store atomic i8 1, i8* @b seq_cst, align 1
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++b;
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// Currently, we have no variant of atomicrmw that returns the new value, so
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// we have to generate an atomic add, which returns the old value, and then a
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// non-atomic add.
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// CHECK: atomicrmw add i32* @i, i32 1 seq_cst
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// CHECK: add i32
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++i;
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// CHECK: atomicrmw add i64* @l, i64 1 seq_cst
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// CHECK: add i64
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++l;
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// CHECK: atomicrmw add i16* @s, i16 1 seq_cst
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// CHECK: add i16
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++s;
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}
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// CHECK: testdec
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void testdec(void)
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{
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// CHECK: cmpxchg i8* @b
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b--;
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// CHECK: atomicrmw sub i32* @i, i32 1 seq_cst
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i--;
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// CHECK: atomicrmw sub i64* @l, i64 1 seq_cst
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l--;
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// CHECK: atomicrmw sub i16* @s, i16 1 seq_cst
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s--;
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// CHECK: cmpxchg i8* @b
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--b;
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// CHECK: atomicrmw sub i32* @i, i32 1 seq_cst
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// CHECK: sub i32
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--i;
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// CHECK: atomicrmw sub i64* @l, i64 1 seq_cst
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// CHECK: sub i64
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--l;
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// CHECK: atomicrmw sub i16* @s, i16 1 seq_cst
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// CHECK: sub i16
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--s;
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}
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// CHECK: testaddeq
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void testaddeq(void)
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{
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// CHECK: cmpxchg i8* @b
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// CHECK: atomicrmw add i32* @i, i32 42 seq_cst
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// CHECK: atomicrmw add i64* @l, i64 42 seq_cst
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// CHECK: atomicrmw add i16* @s, i16 42 seq_cst
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b += 42;
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i += 42;
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l += 42;
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s += 42;
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}
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// CHECK: testsubeq
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void testsubeq(void)
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{
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// CHECK: cmpxchg i8* @b
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// CHECK: atomicrmw sub i32* @i, i32 42 seq_cst
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// CHECK: atomicrmw sub i64* @l, i64 42 seq_cst
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// CHECK: atomicrmw sub i16* @s, i16 42 seq_cst
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b -= 42;
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i -= 42;
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l -= 42;
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s -= 42;
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}
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// CHECK: testxoreq
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void testxoreq(void)
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{
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// CHECK: cmpxchg i8* @b
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// CHECK: atomicrmw xor i32* @i, i32 42 seq_cst
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// CHECK: atomicrmw xor i64* @l, i64 42 seq_cst
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// CHECK: atomicrmw xor i16* @s, i16 42 seq_cst
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b ^= 42;
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i ^= 42;
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l ^= 42;
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s ^= 42;
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}
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// CHECK: testoreq
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void testoreq(void)
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{
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// CHECK: cmpxchg i8* @b
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// CHECK: atomicrmw or i32* @i, i32 42 seq_cst
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// CHECK: atomicrmw or i64* @l, i64 42 seq_cst
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// CHECK: atomicrmw or i16* @s, i16 42 seq_cst
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b |= 42;
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i |= 42;
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l |= 42;
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s |= 42;
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}
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// CHECK: testandeq
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void testandeq(void)
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{
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// CHECK: cmpxchg i8* @b
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// CHECK: atomicrmw and i32* @i, i32 42 seq_cst
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// CHECK: atomicrmw and i64* @l, i64 42 seq_cst
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// CHECK: atomicrmw and i16* @s, i16 42 seq_cst
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b &= 42;
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i &= 42;
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l &= 42;
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s &= 42;
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}
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// CHECK-LABEL: define arm_aapcscc void @testFloat(float*
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void testFloat(_Atomic(float) *fp) {
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// CHECK: [[FP:%.*]] = alloca float*
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// CHECK-NEXT: [[X:%.*]] = alloca float
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// CHECK-NEXT: [[F:%.*]] = alloca float
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// CHECK-NEXT: [[TMP0:%.*]] = alloca float
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// CHECK-NEXT: [[TMP1:%.*]] = alloca float
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// CHECK-NEXT: store float* {{%.*}}, float** [[FP]]
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// CHECK-NEXT: [[T0:%.*]] = load float** [[FP]]
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// CHECK-NEXT: store float 1.000000e+00, float* [[T0]], align 4
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__c11_atomic_init(fp, 1.0f);
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// CHECK-NEXT: store float 2.000000e+00, float* [[X]], align 4
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_Atomic(float) x = 2.0f;
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// CHECK-NEXT: [[T0:%.*]] = load float** [[FP]]
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// CHECK-NEXT: [[T1:%.*]] = bitcast float* [[T0]] to i8*
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// CHECK-NEXT: [[T2:%.*]] = bitcast float* [[TMP0]] to i8*
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// CHECK-NEXT: call arm_aapcscc void @__atomic_load(i32 4, i8* [[T1]], i8* [[T2]], i32 5)
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// CHECK-NEXT: [[T3:%.*]] = load float* [[TMP0]], align 4
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// CHECK-NEXT: store float [[T3]], float* [[F]]
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float f = *fp;
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// CHECK-NEXT: [[T0:%.*]] = load float* [[F]], align 4
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// CHECK-NEXT: [[T1:%.*]] = load float** [[FP]], align 4
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// CHECK-NEXT: store float [[T0]], float* [[TMP1]], align 4
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// CHECK-NEXT: [[T2:%.*]] = bitcast float* [[T1]] to i8*
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// CHECK-NEXT: [[T3:%.*]] = bitcast float* [[TMP1]] to i8*
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// CHECK-NEXT: call arm_aapcscc void @__atomic_store(i32 4, i8* [[T2]], i8* [[T3]], i32 5)
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*fp = f;
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// CHECK-NEXT: ret void
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}
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// CHECK: define arm_aapcscc void @testComplexFloat([[CF:{ float, float }]]*
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void testComplexFloat(_Atomic(_Complex float) *fp) {
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// CHECK: [[FP:%.*]] = alloca [[CF]]*, align 4
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// CHECK-NEXT: [[X:%.*]] = alloca [[CF]], align 8
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// CHECK-NEXT: [[F:%.*]] = alloca [[CF]], align 4
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// CHECK-NEXT: [[TMP0:%.*]] = alloca [[CF]], align 8
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// CHECK-NEXT: [[TMP1:%.*]] = alloca [[CF]], align 8
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// CHECK-NEXT: store [[CF]]*
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// CHECK-NEXT: [[P:%.*]] = load [[CF]]** [[FP]]
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[CF]]* [[P]], i32 0, i32 0
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// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[CF]]* [[P]], i32 0, i32 1
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// CHECK-NEXT: store float 1.000000e+00, float* [[T0]]
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// CHECK-NEXT: store float 0.000000e+00, float* [[T1]]
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__c11_atomic_init(fp, 1.0f);
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[CF]]* [[X]], i32 0, i32 0
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// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[CF]]* [[X]], i32 0, i32 1
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// CHECK-NEXT: store float 2.000000e+00, float* [[T0]]
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// CHECK-NEXT: store float 0.000000e+00, float* [[T1]]
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_Atomic(_Complex float) x = 2.0f;
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// CHECK-NEXT: [[T0:%.*]] = load [[CF]]** [[FP]]
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// CHECK-NEXT: [[T1:%.*]] = bitcast [[CF]]* [[T0]] to i8*
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// CHECK-NEXT: [[T2:%.*]] = bitcast [[CF]]* [[TMP0]] to i8*
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// CHECK-NEXT: call arm_aapcscc void @__atomic_load(i32 8, i8* [[T1]], i8* [[T2]], i32 5)
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[CF]]* [[TMP0]], i32 0, i32 0
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// CHECK-NEXT: [[R:%.*]] = load float* [[T0]]
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[CF]]* [[TMP0]], i32 0, i32 1
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// CHECK-NEXT: [[I:%.*]] = load float* [[T0]]
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[CF]]* [[F]], i32 0, i32 0
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// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[CF]]* [[F]], i32 0, i32 1
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// CHECK-NEXT: store float [[R]], float* [[T0]]
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// CHECK-NEXT: store float [[I]], float* [[T1]]
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_Complex float f = *fp;
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[CF]]* [[F]], i32 0, i32 0
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// CHECK-NEXT: [[R:%.*]] = load float* [[T0]]
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[CF]]* [[F]], i32 0, i32 1
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// CHECK-NEXT: [[I:%.*]] = load float* [[T0]]
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// CHECK-NEXT: [[DEST:%.*]] = load [[CF]]** [[FP]], align 4
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[CF]]* [[TMP1]], i32 0, i32 0
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// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[CF]]* [[TMP1]], i32 0, i32 1
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// CHECK-NEXT: store float [[R]], float* [[T0]]
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// CHECK-NEXT: store float [[I]], float* [[T1]]
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// CHECK-NEXT: [[T0:%.*]] = bitcast [[CF]]* [[DEST]] to i8*
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// CHECK-NEXT: [[T1:%.*]] = bitcast [[CF]]* [[TMP1]] to i8*
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// CHECK-NEXT: call arm_aapcscc void @__atomic_store(i32 8, i8* [[T0]], i8* [[T1]], i32 5)
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*fp = f;
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// CHECK-NEXT: ret void
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}
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typedef struct { short x, y, z, w; } S;
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// CHECK: define arm_aapcscc void @testStruct([[S:.*]]*
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void testStruct(_Atomic(S) *fp) {
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// CHECK: [[FP:%.*]] = alloca [[S]]*, align 4
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// CHECK-NEXT: [[X:%.*]] = alloca [[S]], align 8
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// CHECK-NEXT: [[F:%.*]] = alloca [[S:%.*]], align 2
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// CHECK-NEXT: [[TMP0:%.*]] = alloca [[S]], align 8
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// CHECK-NEXT: store [[S]]*
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// CHECK-NEXT: [[P:%.*]] = load [[S]]** [[FP]]
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[S]]* [[P]], i32 0, i32 0
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// CHECK-NEXT: store i16 1, i16* [[T0]], align 2
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[S]]* [[P]], i32 0, i32 1
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// CHECK-NEXT: store i16 2, i16* [[T0]], align 2
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[S]]* [[P]], i32 0, i32 2
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// CHECK-NEXT: store i16 3, i16* [[T0]], align 2
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[S]]* [[P]], i32 0, i32 3
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// CHECK-NEXT: store i16 4, i16* [[T0]], align 2
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__c11_atomic_init(fp, (S){1,2,3,4});
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[S]]* [[X]], i32 0, i32 0
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// CHECK-NEXT: store i16 1, i16* [[T0]], align 2
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[S]]* [[X]], i32 0, i32 1
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// CHECK-NEXT: store i16 2, i16* [[T0]], align 2
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[S]]* [[X]], i32 0, i32 2
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// CHECK-NEXT: store i16 3, i16* [[T0]], align 2
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[S]]* [[X]], i32 0, i32 3
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// CHECK-NEXT: store i16 4, i16* [[T0]], align 2
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_Atomic(S) x = (S){1,2,3,4};
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// CHECK-NEXT: [[T0:%.*]] = load [[S]]** [[FP]]
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// CHECK-NEXT: [[T1:%.*]] = bitcast [[S]]* [[T0]] to i8*
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// CHECK-NEXT: [[T2:%.*]] = bitcast [[S]]* [[F]] to i8*
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// CHECK-NEXT: call arm_aapcscc void @__atomic_load(i32 8, i8* [[T1]], i8* [[T2]], i32 5)
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S f = *fp;
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// CHECK-NEXT: [[T0:%.*]] = load [[S]]** [[FP]]
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// CHECK-NEXT: [[T1:%.*]] = bitcast [[S]]* [[TMP0]] to i8*
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// CHECK-NEXT: [[T2:%.*]] = bitcast [[S]]* [[F]] to i8*
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// CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* [[T1]], i8* [[T2]], i32 8, i32 2, i1 false)
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// CHECK-NEXT: [[T3:%.*]] = bitcast [[S]]* [[T0]] to i8*
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// CHECK-NEXT: [[T4:%.*]] = bitcast [[S]]* [[TMP0]] to i8*
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// CHECK-NEXT: call arm_aapcscc void @__atomic_store(i32 8, i8* [[T3]], i8* [[T4]], i32 5)
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*fp = f;
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// CHECK-NEXT: ret void
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}
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typedef struct { short x, y, z; } PS;
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// CHECK: define arm_aapcscc void @testPromotedStruct([[APS:.*]]*
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void testPromotedStruct(_Atomic(PS) *fp) {
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// CHECK: [[FP:%.*]] = alloca [[APS]]*, align 4
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// CHECK-NEXT: [[X:%.*]] = alloca [[APS]], align 8
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// CHECK-NEXT: [[F:%.*]] = alloca [[PS:%.*]], align 2
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// CHECK-NEXT: [[TMP0:%.*]] = alloca [[APS]], align 8
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// CHECK-NEXT: [[TMP1:%.*]] = alloca [[APS]], align 8
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// CHECK-NEXT: [[A:%.*]] = alloca i32, align 4
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// CHECK-NEXT: [[TMP2:%.*]] = alloca %struct.PS, align 2
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// CHECK-NEXT: [[TMP3:%.*]] = alloca [[APS]], align 8
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// CHECK-NEXT: store [[APS]]*
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// CHECK-NEXT: [[P:%.*]] = load [[APS]]** [[FP]]
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// CHECK-NEXT: [[T0:%.*]] = bitcast [[APS]]* [[P]] to i8*
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// CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* [[T0]], i8 0, i64 8, i32 8, i1 false)
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[APS]]* [[P]], i32 0, i32 0
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// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[PS]]* [[T0]], i32 0, i32 0
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// CHECK-NEXT: store i16 1, i16* [[T1]], align 2
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// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[PS]]* [[T0]], i32 0, i32 1
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// CHECK-NEXT: store i16 2, i16* [[T1]], align 2
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// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[PS]]* [[T0]], i32 0, i32 2
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// CHECK-NEXT: store i16 3, i16* [[T1]], align 2
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__c11_atomic_init(fp, (PS){1,2,3});
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// CHECK-NEXT: [[T0:%.*]] = bitcast [[APS]]* [[X]] to i8*
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// CHECK-NEXT: call void @llvm.memset.p0i8.i32(i8* [[T0]], i8 0, i32 8, i32 8, i1 false)
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[APS]]* [[X]], i32 0, i32 0
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// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[PS]]* [[T0]], i32 0, i32 0
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// CHECK-NEXT: store i16 1, i16* [[T1]], align 2
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// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[PS]]* [[T0]], i32 0, i32 1
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// CHECK-NEXT: store i16 2, i16* [[T1]], align 2
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// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[PS]]* [[T0]], i32 0, i32 2
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// CHECK-NEXT: store i16 3, i16* [[T1]], align 2
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_Atomic(PS) x = (PS){1,2,3};
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// CHECK-NEXT: [[T0:%.*]] = load [[APS]]** [[FP]]
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// CHECK-NEXT: [[T1:%.*]] = bitcast [[APS]]* [[T0]] to i8*
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// CHECK-NEXT: [[T2:%.*]] = bitcast [[APS]]* [[TMP0]] to i8*
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// CHECK-NEXT: call arm_aapcscc void @__atomic_load(i32 8, i8* [[T1]], i8* [[T2]], i32 5)
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[APS]]* [[TMP0]], i32 0, i32 0
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// CHECK-NEXT: [[T1:%.*]] = bitcast [[PS]]* [[F]] to i8*
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// CHECK-NEXT: [[T2:%.*]] = bitcast [[PS]]* [[T0]] to i8*
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// CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* [[T1]], i8* [[T2]], i32 6, i32 2, i1 false)
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PS f = *fp;
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// CHECK-NEXT: [[T0:%.*]] = load [[APS]]** [[FP]]
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// CHECK-NEXT: [[T1:%.*]] = bitcast { %struct.PS, [2 x i8] }* [[TMP1]] to i8*
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// CHECK-NEXT: call void @llvm.memset.p0i8.i32(i8* [[T1]], i8 0, i32 8, i32 8, i1 false)
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// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[APS]]* [[TMP1]], i32 0, i32 0
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// CHECK-NEXT: [[T2:%.*]] = bitcast [[PS]]* [[T1]] to i8*
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// CHECK-NEXT: [[T3:%.*]] = bitcast [[PS]]* [[F]] to i8*
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// CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* [[T2]], i8* [[T3]], i32 6, i32 2, i1 false)
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// CHECK-NEXT: [[T4:%.*]] = bitcast [[APS]]* [[T0]] to i8*
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// CHECK-NEXT: [[T5:%.*]] = bitcast [[APS]]* [[TMP1]] to i8*
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// CHECK-NEXT: call arm_aapcscc void @__atomic_store(i32 8, i8* [[T4]], i8* [[T5]], i32 5)
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*fp = f;
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// CHECK-NEXT: [[T0:%.*]] = load [[APS]]** [[FP]], align 4
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// CHECK-NEXT: [[T1:%.*]] = bitcast [[APS]]* [[T0]] to i8*
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// CHECK-NEXT: [[T2:%.*]] = bitcast [[APS]]* [[TMP3]] to i8*
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// CHECK-NEXT: call arm_aapcscc void @__atomic_load(i32 8, i8* [[T1]], i8* [[T2]], i32 5)
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[APS]]* [[TMP3]], i32 0, i32 0
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// CHECK-NEXT: [[T1:%.*]] = bitcast %struct.PS* [[TMP2]] to i8*
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// CHECK-NEXT: [[T2:%.*]] = bitcast %struct.PS* [[T0]] to i8*
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// CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* [[T1]], i8* [[T2]], i32 6, i32 2, i1 false)
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds %struct.PS* [[TMP2]], i32 0, i32 0
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// CHECK-NEXT: [[T1:%.*]] = load i16* [[T0]], align 2
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// CHECK-NEXT: [[T2:%.*]] = sext i16 [[T1]] to i32
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// CHECK-NEXT: store i32 [[T2]], i32* [[A]], align 4
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int a = ((PS)*fp).x;
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// CHECK-NEXT: ret void
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}
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// CHECK: define arm_aapcscc void @testPromotedStructOps([[APS:.*]]*
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// FIXME: none of these look right, but we can leave the "test" here
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// to make sure they at least don't crash.
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void testPromotedStructOps(_Atomic(PS) *p) {
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PS a = __c11_atomic_load(p, 5);
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__c11_atomic_store(p, a, 5);
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PS b = __c11_atomic_exchange(p, a, 5);
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_Bool v = __c11_atomic_compare_exchange_strong(p, &b, a, 5, 5);
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v = __c11_atomic_compare_exchange_weak(p, &b, a, 5, 5);
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}
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