forked from OSchip/llvm-project
66 lines
2.1 KiB
LLVM
66 lines
2.1 KiB
LLVM
; RUN: opt -S -analyze -stack-safety-local < %s | FileCheck %s --check-prefixes=CHECK,LOCAL
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; RUN: opt -S -passes="print<stack-safety-local>" -disable-output < %s 2>&1 | FileCheck %s --check-prefixes=CHECK,LOCAL
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; RUN: opt -S -analyze -stack-safety < %s | FileCheck %s --check-prefixes=CHECK,GLOBAL
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; RUN: opt -S -passes="print-stack-safety" -disable-output < %s 2>&1 | FileCheck %s --check-prefixes=CHECK,GLOBAL
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; Regression test that exercises a case when a AllocaOffsetRewritten SCEV
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; could return an empty-set range. This could occur with udiv SCEVs where the
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; RHS was re-written to 0.
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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declare void @ExternalFn(i64)
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define void @Test1() {
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; CHECK-LABEL: @Test1 dso_preemptable{{$}}
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; CHECK-NEXT: args uses:
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; CHECK-NEXT: allocas uses:
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; LOCAL-NEXT: x[1]: empty-set, @Divide1(arg0, full-set){{$}}
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; GLOBAL-NEXT: x[1]: full-set, @Divide1(arg0, full-set){{$}}
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; CHECK-NOT: ]:
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%x = alloca i8
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%int = ptrtoint i8* %x to i64
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call void @Divide1(i64 %int)
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ret void
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}
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define dso_local void @Divide1(i64 %arg) {
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; CHECK-LABEL: @Divide1{{$}}
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; CHECK-NEXT: args uses:
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; LOCAL-NEXT: arg[]: empty-set, @ExternalFn(arg0, full-set){{$}}
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; GLOBAL-NEXT: arg[]: full-set, @ExternalFn(arg0, full-set){{$}}
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; CHECK-NEXT: allocas uses:
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; CHECK-NOT: ]:
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%quotient = udiv i64 undef, %arg
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call void @ExternalFn(i64 %quotient)
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unreachable
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}
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define void @Test2(i64 %arg) {
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; CHECK-LABEL: @Test2 dso_preemptable{{$}}
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; CHECK-NEXT: args uses:
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; CHECK-NEXT: arg[]: empty-set{{$}}
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; CHECK-NEXT: allocas uses:
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; LOCAL-NEXT: x[1]: empty-set, @Divide2(arg0, full-set){{$}}
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; GLOBAL-NEXT: x[1]: full-set, @Divide2(arg0, full-set){{$}}
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; CHECK-NOT: ]:
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%x = alloca i8
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%int = ptrtoint i8* %x to i64
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call void @Divide2(i64 %int)
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ret void
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}
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define dso_local void @Divide2(i64 %arg) {
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; CHECK-LABEL: @Divide2{{$}}
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; CHECK-NEXT: args uses:
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; CHECK-NEXT: arg[]: full-set{{$}}
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; CHECK-NEXT: allocas uses:
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; CHECK-NOT: ]:
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%x = inttoptr i64 %arg to i8*
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%quotient = udiv i64 undef, %arg
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%arrayidx = getelementptr i8, i8* %x, i64 %quotient
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load i8, i8* %arrayidx
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unreachable
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}
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