239 lines
12 KiB
C
239 lines
12 KiB
C
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// RUN: %clang_cc1 -triple aarch64 -emit-llvm -o - %s | FileCheck %s
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#include <stdarg.h>
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// Obviously there's more than one way to implement va_arg. This test should at
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// least prevent unintentional regressions caused by refactoring.
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va_list the_list;
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int simple_int(void) {
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// CHECK-LABEL: define i32 @simple_int
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return va_arg(the_list, int);
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// CHECK: [[GR_OFFS:%[a-z_0-9]+]] = load i32* getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 3)
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// CHECK: [[EARLY_ONSTACK:%[a-z_0-9]+]] = icmp sge i32 [[GR_OFFS]], 0
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// CHECK: br i1 [[EARLY_ONSTACK]], label %[[VAARG_ON_STACK:[a-z_.0-9]+]], label %[[VAARG_MAYBE_REG:[a-z_.0-9]+]]
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// CHECK: [[VAARG_MAYBE_REG]]
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// CHECK: [[NEW_REG_OFFS:%[a-z_0-9]+]] = add i32 [[GR_OFFS]], 8
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// CHECK: store i32 [[NEW_REG_OFFS]], i32* getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 3)
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// CHECK: [[INREG:%[a-z_0-9]+]] = icmp sle i32 [[NEW_REG_OFFS]], 0
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// CHECK: br i1 [[INREG]], label %[[VAARG_IN_REG:[a-z_.0-9]+]], label %[[VAARG_ON_STACK]]
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// CHECK: [[VAARG_IN_REG]]
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// CHECK: [[REG_TOP:%[a-z_0-9]+]] = load i8** getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 1)
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// CHECK: [[REG_ADDR:%[a-z_0-9]+]] = getelementptr i8* [[REG_TOP]], i32 [[GR_OFFS]]
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// CHECK: [[FROMREG_ADDR:%[a-z_0-9]+]] = bitcast i8* [[REG_ADDR]] to i32*
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// CHECK: br label %[[VAARG_END:[a-z._0-9]+]]
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// CHECK: [[VAARG_ON_STACK]]
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// CHECK: [[STACK:%[a-z_0-9]+]] = load i8** getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 0)
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// CHECK: [[NEW_STACK:%[a-z_0-9]+]] = getelementptr i8* [[STACK]], i32 8
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// CHECK: store i8* [[NEW_STACK]], i8** getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 0)
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// CHECK: [[FROMSTACK_ADDR:%[a-z_0-9]+]] = bitcast i8* [[STACK]] to i32*
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// CHECK: br label %[[VAARG_END]]
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// CHECK: [[VAARG_END]]
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// CHECK: [[ADDR:%[a-z._0-9]+]] = phi i32* [ [[FROMREG_ADDR]], %[[VAARG_IN_REG]] ], [ [[FROMSTACK_ADDR]], %[[VAARG_ON_STACK]] ]
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// CHECK: [[RESULT:%[a-z_0-9]+]] = load i32* [[ADDR]]
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// CHECK: ret i32 [[RESULT]]
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}
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__int128 aligned_int(void) {
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// CHECK-LABEL: define i128 @aligned_int
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return va_arg(the_list, __int128);
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// CHECK: [[GR_OFFS:%[a-z_0-9]+]] = load i32* getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 3)
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// CHECK: [[EARLY_ONSTACK:%[a-z_0-9]+]] = icmp sge i32 [[GR_OFFS]], 0
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// CHECK: br i1 [[EARLY_ONSTACK]], label %[[VAARG_ON_STACK:[a-z_.0-9]+]], label %[[VAARG_MAYBE_REG:[a-z_.0-9]+]]
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// CHECK: [[VAARG_MAYBE_REG]]
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// CHECK: [[ALIGN_REGOFFS:%[a-z_0-9]+]] = add i32 [[GR_OFFS]], 15
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// CHECK: [[ALIGNED_REGOFFS:%[a-z_0-9]+]] = and i32 [[ALIGN_REGOFFS]], -16
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// CHECK: [[NEW_REG_OFFS:%[a-z_0-9]+]] = add i32 [[ALIGNED_REGOFFS]], 16
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// CHECK: store i32 [[NEW_REG_OFFS]], i32* getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 3)
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// CHECK: [[INREG:%[a-z_0-9]+]] = icmp sle i32 [[NEW_REG_OFFS]], 0
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// CHECK: br i1 [[INREG]], label %[[VAARG_IN_REG:[a-z_.0-9]+]], label %[[VAARG_ON_STACK]]
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// CHECK: [[VAARG_IN_REG]]
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// CHECK: [[REG_TOP:%[a-z_0-9]+]] = load i8** getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 1)
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// CHECK: [[REG_ADDR:%[a-z_0-9]+]] = getelementptr i8* [[REG_TOP]], i32 [[ALIGNED_REGOFFS]]
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// CHECK: [[FROMREG_ADDR:%[a-z_0-9]+]] = bitcast i8* [[REG_ADDR]] to i128*
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// CHECK: br label %[[VAARG_END:[a-z._0-9]+]]
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// CHECK: [[VAARG_ON_STACK]]
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// CHECK: [[STACK:%[a-z_0-9]+]] = load i8** getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 0)
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// CHECK: [[STACKINT:%[a-z_0-9]+]] = ptrtoint i8* [[STACK]] to i64
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// CHECK: [[ALIGN_STACK:%[a-z_0-9]+]] = add i64 [[STACKINT]], 15
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// CHECK: [[ALIGNED_STACK_INT:%[a-z_0-9]+]] = and i64 [[ALIGN_STACK]], -16
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// CHECK: [[ALIGNED_STACK_PTR:%[a-z_0-9]+]] = inttoptr i64 [[ALIGNED_STACK_INT]] to i8*
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// CHECK: [[NEW_STACK:%[a-z_0-9]+]] = getelementptr i8* [[ALIGNED_STACK_PTR]], i32 16
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// CHECK: store i8* [[NEW_STACK]], i8** getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 0)
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// CHECK: [[FROMSTACK_ADDR:%[a-z_0-9]+]] = bitcast i8* [[ALIGNED_STACK_PTR]] to i128*
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// CHECK: br label %[[VAARG_END]]
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// CHECK: [[VAARG_END]]
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// CHECK: [[ADDR:%[a-z._0-9]+]] = phi i128* [ [[FROMREG_ADDR]], %[[VAARG_IN_REG]] ], [ [[FROMSTACK_ADDR]], %[[VAARG_ON_STACK]] ]
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// CHECK: [[RESULT:%[a-z_0-9]+]] = load i128* [[ADDR]]
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// CHECK: ret i128 [[RESULT]]
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}
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struct bigstruct {
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int a[10];
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};
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struct bigstruct simple_indirect(void) {
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// CHECK-LABEL: define void @simple_indirect
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return va_arg(the_list, struct bigstruct);
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// CHECK: [[GR_OFFS:%[a-z_0-9]+]] = load i32* getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 3)
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// CHECK: [[EARLY_ONSTACK:%[a-z_0-9]+]] = icmp sge i32 [[GR_OFFS]], 0
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// CHECK: br i1 [[EARLY_ONSTACK]], label %[[VAARG_ON_STACK:[a-z_.0-9]+]], label %[[VAARG_MAYBE_REG:[a-z_.0-9]+]]
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// CHECK: [[VAARG_MAYBE_REG]]
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// CHECK-NOT: and i32
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// CHECK: [[NEW_REG_OFFS:%[a-z_0-9]+]] = add i32 [[GR_OFFS]], 8
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// CHECK: store i32 [[NEW_REG_OFFS]], i32* getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 3)
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// CHECK: [[INREG:%[a-z_0-9]+]] = icmp sle i32 [[NEW_REG_OFFS]], 0
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// CHECK: br i1 [[INREG]], label %[[VAARG_IN_REG:[a-z_.0-9]+]], label %[[VAARG_ON_STACK]]
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// CHECK: [[VAARG_IN_REG]]
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// CHECK: [[REG_TOP:%[a-z_0-9]+]] = load i8** getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 1)
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// CHECK: [[REG_ADDR:%[a-z_0-9]+]] = getelementptr i8* [[REG_TOP]], i32 [[GR_OFFS]]
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// CHECK: [[FROMREG_ADDR:%[a-z_0-9]+]] = bitcast i8* [[REG_ADDR]] to %struct.bigstruct**
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// CHECK: br label %[[VAARG_END:[a-z._0-9]+]]
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// CHECK: [[VAARG_ON_STACK]]
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// CHECK: [[STACK:%[a-z_0-9]+]] = load i8** getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 0)
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// CHECK-NOT: and i64
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// CHECK: [[NEW_STACK:%[a-z_0-9]+]] = getelementptr i8* [[STACK]], i32 8
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// CHECK: store i8* [[NEW_STACK]], i8** getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 0)
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// CHECK: [[FROMSTACK_ADDR:%[a-z_0-9]+]] = bitcast i8* [[STACK]] to %struct.bigstruct**
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// CHECK: br label %[[VAARG_END]]
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// CHECK: [[VAARG_END]]
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// CHECK: [[ADDR:%[a-z._0-9]+]] = phi %struct.bigstruct** [ [[FROMREG_ADDR]], %[[VAARG_IN_REG]] ], [ [[FROMSTACK_ADDR]], %[[VAARG_ON_STACK]] ]
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// CHECK: load %struct.bigstruct** [[ADDR]]
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}
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struct aligned_bigstruct {
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float a;
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long double b;
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};
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struct aligned_bigstruct simple_aligned_indirect(void) {
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// CHECK-LABEL: define void @simple_aligned_indirect
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return va_arg(the_list, struct aligned_bigstruct);
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// CHECK: [[GR_OFFS:%[a-z_0-9]+]] = load i32* getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 3)
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// CHECK: [[EARLY_ONSTACK:%[a-z_0-9]+]] = icmp sge i32 [[GR_OFFS]], 0
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// CHECK: br i1 [[EARLY_ONSTACK]], label %[[VAARG_ON_STACK:[a-z_.0-9]+]], label %[[VAARG_MAYBE_REG:[a-z_.0-9]+]]
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// CHECK: [[VAARG_MAYBE_REG]]
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// CHECK: [[NEW_REG_OFFS:%[a-z_0-9]+]] = add i32 [[GR_OFFS]], 8
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// CHECK: store i32 [[NEW_REG_OFFS]], i32* getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 3)
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// CHECK: [[INREG:%[a-z_0-9]+]] = icmp sle i32 [[NEW_REG_OFFS]], 0
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// CHECK: br i1 [[INREG]], label %[[VAARG_IN_REG:[a-z_.0-9]+]], label %[[VAARG_ON_STACK]]
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// CHECK: [[VAARG_IN_REG]]
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// CHECK: [[REG_TOP:%[a-z_0-9]+]] = load i8** getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 1)
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// CHECK: [[REG_ADDR:%[a-z_0-9]+]] = getelementptr i8* [[REG_TOP]], i32 [[GR_OFFS]]
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// CHECK: [[FROMREG_ADDR:%[a-z_0-9]+]] = bitcast i8* [[REG_ADDR]] to %struct.aligned_bigstruct**
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// CHECK: br label %[[VAARG_END:[a-z._0-9]+]]
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// CHECK: [[VAARG_ON_STACK]]
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// CHECK: [[STACK:%[a-z_0-9]+]] = load i8** getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 0)
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// CHECK: [[NEW_STACK:%[a-z_0-9]+]] = getelementptr i8* [[STACK]], i32 8
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// CHECK: store i8* [[NEW_STACK]], i8** getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 0)
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// CHECK: [[FROMSTACK_ADDR:%[a-z_0-9]+]] = bitcast i8* [[STACK]] to %struct.aligned_bigstruct**
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// CHECK: br label %[[VAARG_END]]
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// CHECK: [[VAARG_END]]
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// CHECK: [[ADDR:%[a-z._0-9]+]] = phi %struct.aligned_bigstruct** [ [[FROMREG_ADDR]], %[[VAARG_IN_REG]] ], [ [[FROMSTACK_ADDR]], %[[VAARG_ON_STACK]] ]
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// CHECK: load %struct.aligned_bigstruct** [[ADDR]]
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}
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double simple_double(void) {
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// CHECK-LABEL: define double @simple_double
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return va_arg(the_list, double);
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// CHECK: [[VR_OFFS:%[a-z_0-9]+]] = load i32* getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 4)
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// CHECK: [[EARLY_ONSTACK:%[a-z_0-9]+]] = icmp sge i32 [[VR_OFFS]], 0
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// CHECK: br i1 [[EARLY_ONSTACK]], label %[[VAARG_ON_STACK]], label %[[VAARG_MAYBE_REG]]
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// CHECK: [[VAARG_MAYBE_REG]]
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// CHECK: [[NEW_REG_OFFS:%[a-z_0-9]+]] = add i32 [[VR_OFFS]], 16
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// CHECK: store i32 [[NEW_REG_OFFS]], i32* getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 4)
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// CHECK: [[INREG:%[a-z_0-9]+]] = icmp sle i32 [[NEW_REG_OFFS]], 0
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// CHECK: br i1 [[INREG]], label %[[VAARG_IN_REG:[a-z_.0-9]+]], label %[[VAARG_ON_STACK]]
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// CHECK: [[VAARG_IN_REG]]
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// CHECK: [[REG_TOP:%[a-z_0-9]+]] = load i8** getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 2)
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// CHECK: [[REG_ADDR:%[a-z_0-9]+]] = getelementptr i8* [[REG_TOP]], i32 [[VR_OFFS]]
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// CHECK: [[FROMREG_ADDR:%[a-z_0-9]+]] = bitcast i8* [[REG_ADDR]] to double*
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// CHECK: br label %[[VAARG_END]]
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// CHECK: [[VAARG_ON_STACK]]
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// CHECK: [[STACK:%[a-z_0-9]+]] = load i8** getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 0)
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// CHECK: [[NEW_STACK:%[a-z_0-9]+]] = getelementptr i8* [[STACK]], i32 8
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// CHECK: store i8* [[NEW_STACK]], i8** getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 0)
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// CHECK: [[FROMSTACK_ADDR:%[a-z_0-9]+]] = bitcast i8* [[STACK]] to double*
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// CHECK: br label %[[VAARG_END]]
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// CHECK: [[VAARG_END]]
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// CHECK: [[ADDR:%[a-z._0-9]+]] = phi double* [ [[FROMREG_ADDR]], %[[VAARG_IN_REG]] ], [ [[FROMSTACK_ADDR]], %[[VAARG_ON_STACK]] ]
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// CHECK: [[RESULT:%[a-z_0-9]+]] = load double* [[ADDR]]
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// CHECK: ret double [[RESULT]]
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}
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struct hfa {
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float a, b;
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};
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struct hfa simple_hfa(void) {
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// CHECK-LABEL: define %struct.hfa @simple_hfa
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return va_arg(the_list, struct hfa);
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// CHECK: [[VR_OFFS:%[a-z_0-9]+]] = load i32* getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 4)
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// CHECK: [[EARLY_ONSTACK:%[a-z_0-9]+]] = icmp sge i32 [[VR_OFFS]], 0
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// CHECK: br i1 [[EARLY_ONSTACK]], label %[[VAARG_ON_STACK:[a-z_.0-9]+]], label %[[VAARG_MAYBE_REG:[a-z_.0-9]+]]
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// CHECK: [[VAARG_MAYBE_REG]]
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// CHECK: [[NEW_REG_OFFS:%[a-z_0-9]+]] = add i32 [[VR_OFFS]], 32
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// CHECK: store i32 [[NEW_REG_OFFS]], i32* getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 4)
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// CHECK: [[INREG:%[a-z_0-9]+]] = icmp sle i32 [[NEW_REG_OFFS]], 0
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// CHECK: br i1 [[INREG]], label %[[VAARG_IN_REG:[a-z_.0-9]+]], label %[[VAARG_ON_STACK]]
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// CHECK: [[VAARG_IN_REG]]
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// CHECK: [[REG_TOP:%[a-z_0-9]+]] = load i8** getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 2)
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// CHECK: [[FIRST_REG:%[a-z_0-9]+]] = getelementptr i8* [[REG_TOP]], i32 [[VR_OFFS]]
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// CHECK: [[EL_ADDR:%[a-z_0-9]+]] = getelementptr i8* [[FIRST_REG]], i32 0
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// CHECK: [[EL_TYPED:%[a-z_0-9]+]] = bitcast i8* [[EL_ADDR]] to float*
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// CHECK: [[EL_TMPADDR:%[a-z_0-9]+]] = getelementptr inbounds [2 x float]* %[[TMP_HFA:[a-z_.0-9]+]], i32 0, i32 0
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// CHECK: [[EL:%[a-z_0-9]+]] = load float* [[EL_TYPED]]
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// CHECK: store float [[EL]], float* [[EL_TMPADDR]]
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// CHECK: [[EL_ADDR:%[a-z_0-9]+]] = getelementptr i8* [[FIRST_REG]], i32 16
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// CHECK: [[EL_TYPED:%[a-z_0-9]+]] = bitcast i8* [[EL_ADDR]] to float*
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// CHECK: [[EL_TMPADDR:%[a-z_0-9]+]] = getelementptr inbounds [2 x float]* %[[TMP_HFA]], i32 0, i32 1
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// CHECK: [[EL:%[a-z_0-9]+]] = load float* [[EL_TYPED]]
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// CHECK: store float [[EL]], float* [[EL_TMPADDR]]
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// CHECK: [[FROMREG_ADDR:%[a-z_0-9]+]] = bitcast [2 x float]* %[[TMP_HFA]] to %struct.hfa*
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// CHECK: br label %[[VAARG_END:[a-z_.0-9]+]]
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// CHECK: [[VAARG_ON_STACK]]
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// CHECK: [[STACK:%[a-z_0-9]+]] = load i8** getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 0)
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// CHECK: [[NEW_STACK:%[a-z_0-9]+]] = getelementptr i8* [[STACK]], i32 8
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// CHECK: store i8* [[NEW_STACK]], i8** getelementptr inbounds (%struct.__va_list* @the_list, i32 0, i32 0)
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// CHECK: [[FROMSTACK_ADDR:%[a-z_0-9]+]] = bitcast i8* [[STACK]] to %struct.hfa*
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// CHECK: br label %[[VAARG_END]]
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// CHECK: [[VAARG_END]]
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// CHECK: [[ADDR:%[a-z._0-9]+]] = phi %struct.hfa* [ [[FROMREG_ADDR]], %[[VAARG_IN_REG]] ], [ [[FROMSTACK_ADDR]], %[[VAARG_ON_STACK]] ]
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}
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void check_start(int n, ...) {
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// CHECK-LABEL: define void @check_start(i32 %n, ...)
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va_list the_list;
|
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va_start(the_list, n);
|
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// CHECK: [[THE_LIST:%[a-z_0-9]+]] = alloca %struct.__va_list
|
||
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// CHECK: [[VOIDP_THE_LIST:%[a-z_0-9]+]] = bitcast %struct.__va_list* [[THE_LIST]] to i8*
|
||
|
|
// CHECK: call void @llvm.va_start(i8* [[VOIDP_THE_LIST]])
|
||
|
|
}
|
||
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