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Library functions can have specific semantics that affect the behavior of certain passes. DSE, for instance, gives special treatment to malloc-ed pointers but not to pointers returned from an equivalently typed (but differently named) function. MetaRenamer ought not to alter program semantics, so library functions must remain untouched. Reviewers: mehdi_amini, majnemer, chandlerc, davide Reviewed By: davide Subscribers: davide, llvm-commits Differential Revision: https://reviews.llvm.org/D31304 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@298659 91177308-0d34-0410-b5e6-96231b3b80d8
114 lines
3.6 KiB
LLVM
114 lines
3.6 KiB
LLVM
; RUN: opt -metarenamer -S < %s | FileCheck %s
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; CHECK: target triple {{.*}}
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; CHECK-NOT: {{^x*}}xxx{{^x*}}
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; CHECK: ret i32 6
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target triple = "x86_64-pc-linux-gnu"
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%struct.bar_xxx = type { i32, double }
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%struct.foo_xxx = type { i32, float, %struct.bar_xxx }
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@func_5_xxx.static_local_3_xxx = internal global i32 3, align 4
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@global_3_xxx = common global i32 0, align 4
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@func_7_xxx = weak alias i32 (...), i32 (...)* @aliased_func_7_xxx
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define i32 @aliased_func_7_xxx(...) {
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ret i32 0
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}
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define i32 @func_3_xxx() nounwind uwtable ssp {
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ret i32 3
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}
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define void @func_4_xxx(%struct.foo_xxx* sret %agg.result) nounwind uwtable ssp {
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%1 = alloca %struct.foo_xxx, align 8
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%2 = getelementptr inbounds %struct.foo_xxx, %struct.foo_xxx* %1, i32 0, i32 0
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store i32 1, i32* %2, align 4
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%3 = getelementptr inbounds %struct.foo_xxx, %struct.foo_xxx* %1, i32 0, i32 1
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store float 2.000000e+00, float* %3, align 4
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%4 = getelementptr inbounds %struct.foo_xxx, %struct.foo_xxx* %1, i32 0, i32 2
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%5 = getelementptr inbounds %struct.bar_xxx, %struct.bar_xxx* %4, i32 0, i32 0
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store i32 3, i32* %5, align 4
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%6 = getelementptr inbounds %struct.bar_xxx, %struct.bar_xxx* %4, i32 0, i32 1
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store double 4.000000e+00, double* %6, align 8
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%7 = bitcast %struct.foo_xxx* %agg.result to i8*
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%8 = bitcast %struct.foo_xxx* %1 to i8*
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* %7, i8* %8, i64 24, i32 8, i1 false)
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ret void
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}
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
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define i32 @func_5_xxx(i32 %arg_1_xxx, i32 %arg_2_xxx, i32 %arg_3_xxx, i32 %arg_4_xxx) nounwind uwtable ssp {
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%1 = alloca i32, align 4
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%2 = alloca i32, align 4
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%3 = alloca i32, align 4
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%4 = alloca i32, align 4
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%local_1_xxx = alloca i32, align 4
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%local_2_xxx = alloca i32, align 4
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%i = alloca i32, align 4
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store i32 %arg_1_xxx, i32* %1, align 4
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store i32 %arg_2_xxx, i32* %2, align 4
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store i32 %arg_3_xxx, i32* %3, align 4
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store i32 %arg_4_xxx, i32* %4, align 4
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store i32 1, i32* %local_1_xxx, align 4
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store i32 2, i32* %local_2_xxx, align 4
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store i32 0, i32* %i, align 4
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br label %5
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; <label>:5 ; preds = %9, %0
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%6 = load i32, i32* %i, align 4
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%7 = icmp slt i32 %6, 10
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br i1 %7, label %8, label %12
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; <label>:8 ; preds = %5
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br label %9
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; <label>:9 ; preds = %8
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%10 = load i32, i32* %i, align 4
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%11 = add nsw i32 %10, 1
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store i32 %11, i32* %i, align 4
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br label %5
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; <label>:12 ; preds = %5
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%13 = load i32, i32* %local_1_xxx, align 4
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%14 = load i32, i32* %1, align 4
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%15 = add nsw i32 %13, %14
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%16 = load i32, i32* %local_2_xxx, align 4
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%17 = add nsw i32 %15, %16
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%18 = load i32, i32* %2, align 4
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%19 = add nsw i32 %17, %18
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%20 = load i32, i32* @func_5_xxx.static_local_3_xxx, align 4
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%21 = add nsw i32 %19, %20
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%22 = load i32, i32* %3, align 4
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%23 = add nsw i32 %21, %22
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%24 = load i32, i32* %4, align 4
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%25 = add nsw i32 %23, %24
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ret i32 %25
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}
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define i32 @varargs_func_6_xxx(i32 %arg_1_xxx, i32 %arg_2_xxx, ...) nounwind uwtable ssp {
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%1 = alloca i32, align 4
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%2 = alloca i32, align 4
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store i32 %arg_1_xxx, i32* %1, align 4
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store i32 %arg_2_xxx, i32* %2, align 4
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ret i32 6
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}
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declare noalias i8* @malloc(i32)
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declare void @free(i8* nocapture)
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define void @dont_rename_lib_funcs() {
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; CHECK-LABEL: @foo(
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; CHECK-NEXT: bb:
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; CHECK-NEXT: [[TMP:%.*]] = call i8* @malloc(i32 23)
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; CHECK-NEXT: call void @free(i8* [[TMP]])
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; CHECK-NEXT: ret void
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;
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%x = call i8* @malloc(i32 23)
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call void @free(i8* %x)
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ret void
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}
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