112 lines
4 KiB
C
112 lines
4 KiB
C
// REQUIRES: arm-registered-target
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// RUN: %clang_cc1 -Wall -Werror -triple thumbv7-linux-gnueabi -fno-signed-char -O3 -emit-llvm -o - %s | FileCheck %s
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// Make sure the canonical use works before going into smaller details:
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int atomic_inc(int *addr) {
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int Failure, OldVal;
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do {
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OldVal = __builtin_arm_ldrex(addr);
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Failure = __builtin_arm_strex(OldVal + 1, addr);
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} while (Failure);
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return OldVal;
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}
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// CHECK: @atomic_inc
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// CHECK: [[OLDVAL:%.*]] = tail call i32 @llvm.arm.ldrex.p0i32(i32* %addr)
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// CHECK: [[INC:%.*]] = add nsw i32 [[OLDVAL]], 1
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// CHECK: [[FAILURE:%.*]] = tail call i32 @llvm.arm.strex.p0i32(i32 [[INC]], i32* %addr)
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// CHECK: [[TST:%.*]] = icmp eq i32 [[FAILURE]], 0
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// CHECK: br i1 [[TST]], label {{%[a-zA-Z0-9.]+}}, label {{%[a-zA-Z0-9.]+}}
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struct Simple {
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char a, b;
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};
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int test_ldrex(char *addr, long long *addr64, float *addrfloat) {
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// CHECK: @test_ldrex
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int sum = 0;
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sum += __builtin_arm_ldrex(addr);
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// CHECK: [[INTRES:%.*]] = tail call i32 @llvm.arm.ldrex.p0i8(i8* %addr)
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// CHECK: and i32 [[INTRES]], 255
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sum += __builtin_arm_ldrex((short *)addr);
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// CHECK: [[ADDR16:%.*]] = bitcast i8* %addr to i16*
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// CHECK: [[INTRES:%.*]] = tail call i32 @llvm.arm.ldrex.p0i16(i16* [[ADDR16]])
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// CHECK: [[TMPSEXT:%.*]] = shl i32 [[INTRES]], 16
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// CHECK: ashr exact i32 [[TMPSEXT]], 16
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sum += __builtin_arm_ldrex((int *)addr);
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// CHECK: [[ADDR32:%.*]] = bitcast i8* %addr to i32*
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// CHECK: call i32 @llvm.arm.ldrex.p0i32(i32* [[ADDR32]])
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sum += __builtin_arm_ldrex((long long *)addr);
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// CHECK: call { i32, i32 } @llvm.arm.ldrexd(i8* %addr)
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sum += __builtin_arm_ldrex(addr64);
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// CHECK: [[ADDR64_AS8:%.*]] = bitcast i64* %addr64 to i8*
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// CHECK: call { i32, i32 } @llvm.arm.ldrexd(i8* [[ADDR64_AS8]])
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sum += __builtin_arm_ldrex(addrfloat);
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// CHECK: [[INTADDR:%.*]] = bitcast float* %addrfloat to i32*
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// CHECK: [[INTRES:%.*]] = tail call i32 @llvm.arm.ldrex.p0i32(i32* [[INTADDR]])
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// CHECK: bitcast i32 [[INTRES]] to float
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sum += __builtin_arm_ldrex((double *)addr);
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// CHECK: [[STRUCTRES:%.*]] = tail call { i32, i32 } @llvm.arm.ldrexd(i8* %addr)
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// CHECK: [[RESHI:%.*]] = extractvalue { i32, i32 } [[STRUCTRES]], 1
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// CHECK: [[RESLO:%.*]] = extractvalue { i32, i32 } [[STRUCTRES]], 0
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// CHECK: [[RESHI64:%.*]] = zext i32 [[RESHI]] to i64
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// CHECK: [[RESLO64:%.*]] = zext i32 [[RESLO]] to i64
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// CHECK: [[RESHIHI:%.*]] = shl nuw i64 [[RESHI64]], 32
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// CHECK: [[INTRES:%.*]] = or i64 [[RESHIHI]], [[RESLO64]]
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// CHECK: bitcast i64 [[INTRES]] to double
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sum += *__builtin_arm_ldrex((int **)addr);
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// CHECK: [[INTRES:%.*]] = tail call i32 @llvm.arm.ldrex.p0i32(i32* [[ADDR32]])
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// CHECK: inttoptr i32 [[INTRES]] to i32*
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sum += __builtin_arm_ldrex((struct Simple **)addr)->a;
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// CHECK: [[INTRES:%.*]] = tail call i32 @llvm.arm.ldrex.p0i32(i32* [[ADDR32]])
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// CHECK: inttoptr i32 [[INTRES]] to %struct.Simple*
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return sum;
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}
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int test_strex(char *addr) {
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// CHECK: @test_strex
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int res = 0;
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struct Simple var = {0};
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res |= __builtin_arm_strex(4, addr);
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// CHECK: call i32 @llvm.arm.strex.p0i8(i32 4, i8* %addr)
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res |= __builtin_arm_strex(42, (short *)addr);
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// CHECK: [[ADDR16:%.*]] = bitcast i8* %addr to i16*
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// CHECK: call i32 @llvm.arm.strex.p0i16(i32 42, i16* [[ADDR16]])
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res |= __builtin_arm_strex(42, (int *)addr);
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// CHECK: [[ADDR32:%.*]] = bitcast i8* %addr to i32*
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// CHECK: call i32 @llvm.arm.strex.p0i32(i32 42, i32* [[ADDR32]])
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res |= __builtin_arm_strex(42, (long long *)addr);
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// CHECK: call i32 @llvm.arm.strexd(i32 42, i32 0, i8* %addr)
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res |= __builtin_arm_strex(2.71828f, (float *)addr);
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// CHECK: call i32 @llvm.arm.strex.p0i32(i32 1076754509, i32* [[ADDR32]])
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res |= __builtin_arm_strex(3.14159, (double *)addr);
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// CHECK: call i32 @llvm.arm.strexd(i32 -266631570, i32 1074340345, i8* %addr)
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res |= __builtin_arm_strex(&var, (struct Simple **)addr);
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// CHECK: [[INTVAL:%.*]] = ptrtoint i16* %var to i32
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// CHECK: call i32 @llvm.arm.strex.p0i32(i32 [[INTVAL]], i32* [[ADDR32]])
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return res;
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}
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void test_clrex() {
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// CHECK: @test_clrex
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__builtin_arm_clrex();
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// CHECK: call void @llvm.arm.clrex()
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}
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