a1db0e523d
This fixes a conceptual problem with our AAIsDead usage which conflated call site liveness with call site return value liveness. Without the fix tests would obviously miscompile as we make genericValueTraversal more powerful (in a follow up). The effects on the tests are mixed but mostly marginal. The most prominent one is the lack of `noreturn` for functions. The reason is that we make entire blocks live at the same time (for time reasons). Now that we actually look at the block liveness, which we need to do, the return instructions are live and will survive. As an example, `noreturn_async.ll` has been modified to retain the `noreturn` even with block granularity. We could address this easily but there is little need in practice.
107 lines
4.1 KiB
LLVM
107 lines
4.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --check-attributes --check-globals
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; RUN: opt -attributor -enable-new-pm=0 -attributor-manifest-internal -attributor-max-iterations-verify -attributor-annotate-decl-cs -attributor-max-iterations=2 -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_CGSCC_NPM,NOT_CGSCC_OPM,NOT_TUNIT_NPM,IS__TUNIT____,IS________OPM,IS__TUNIT_OPM
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; RUN: opt -aa-pipeline=basic-aa -passes=attributor -attributor-manifest-internal -attributor-max-iterations-verify -attributor-annotate-decl-cs -attributor-max-iterations=2 -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_CGSCC_OPM,NOT_CGSCC_NPM,NOT_TUNIT_OPM,IS__TUNIT____,IS________NPM,IS__TUNIT_NPM
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; RUN: opt -attributor-cgscc -enable-new-pm=0 -attributor-manifest-internal -attributor-annotate-decl-cs -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_TUNIT_NPM,NOT_TUNIT_OPM,NOT_CGSCC_NPM,IS__CGSCC____,IS________OPM,IS__CGSCC_OPM
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; RUN: opt -aa-pipeline=basic-aa -passes=attributor-cgscc -attributor-manifest-internal -attributor-annotate-decl-cs -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_TUNIT_NPM,NOT_TUNIT_OPM,NOT_CGSCC_OPM,IS__CGSCC____,IS________NPM,IS__CGSCC_NPM
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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%0 = type { i32, %1, %2* }
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%1 = type { i32 }
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%2 = type opaque
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define hidden %0* @f1(i64 %0, i64 %1) {
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; CHECK-LABEL: define {{[^@]+}}@f1
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; CHECK-SAME: (i64 [[TMP0:%.*]], i64 [[TMP1:%.*]]) {
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; CHECK-NEXT: [[TMP3:%.*]] = call { %0*, i64 } @f3(i64 [[TMP0]])
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; CHECK-NEXT: ret %0* undef
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;
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%3 = call { %0*, i64 } @f3(i64 %0)
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ret %0* undef
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}
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define linkonce_odr hidden { %0*, i64 } @f3(i64 %0) align 2 {
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; CHECK-LABEL: define {{[^@]+}}@f3
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; CHECK-SAME: (i64 [[TMP0:%.*]]) align 2 {
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; CHECK-NEXT: [[TMP2:%.*]] = call i32 @f4()
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; CHECK-NEXT: [[TMP3:%.*]] = zext i32 [[TMP2]] to i64
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; CHECK-NEXT: call void @f5(i64 [[TMP3]], i64 [[TMP0]]) #[[ATTR0:[0-9]+]]
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; CHECK-NEXT: ret { %0*, i64 } undef
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;
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%2 = call i32 @f4()
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%3 = zext i32 %2 to i64
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call void @f5(i64 %3, i64 %0)
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ret { %0*, i64 } undef
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}
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define linkonce_odr hidden i32 @f4() align 2 {
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; CHECK-LABEL: define {{[^@]+}}@f4() align 2 {
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; CHECK-NEXT: ret i32 16
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;
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ret i32 16
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}
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define internal void @f5(i64 %0, i64 %1) {
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; CHECK: Function Attrs: nounwind
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; CHECK-LABEL: define {{[^@]+}}@f5
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; CHECK-SAME: (i64 [[TMP0:%.*]], i64 [[TMP1:%.*]]) #[[ATTR0]] {
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; CHECK-NEXT: br label [[TMP3:%.*]]
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; CHECK: 3:
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; CHECK-NEXT: call void @f6(i64 [[TMP0]]) #[[ATTR0]]
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; CHECK-NEXT: [[TMP4:%.*]] = icmp sgt i64 [[TMP1]], [[TMP0]]
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; CHECK-NEXT: br i1 [[TMP4]], label [[TMP5:%.*]], label [[TMP6:%.*]]
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; CHECK: 5:
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; CHECK-NEXT: ret void
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; CHECK: 6:
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; CHECK-NEXT: call void @f5(i64 [[TMP0]], i64 [[TMP1]]) #[[ATTR0]]
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; CHECK-NEXT: br label [[TMP3]]
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;
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br label %3
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3: ; preds = %6, %2
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call void @f6(i64 %0)
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%4 = icmp sgt i64 %1, %0
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br i1 %4, label %5, label %6
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5: ; preds = %3
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ret void
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6: ; preds = %3
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call void @f5(i64 %0, i64 %1)
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br label %3
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}
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define internal void @f6(i64 %0) {
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; CHECK: Function Attrs: nounwind
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; CHECK-LABEL: define {{[^@]+}}@f6
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; CHECK-SAME: (i64 [[TMP0:%.*]]) #[[ATTR0]] {
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; CHECK-NEXT: [[TMP2:%.*]] = icmp sgt i64 [[TMP0]], 0
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; CHECK-NEXT: br i1 [[TMP2]], label [[TMP3:%.*]], label [[TMP4:%.*]]
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; CHECK: 3:
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; CHECK-NEXT: call void @llvm.trap() #[[ATTR2:[0-9]+]]
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; CHECK-NEXT: unreachable
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; CHECK: 4:
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; CHECK-NEXT: ret void
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;
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%2 = icmp sgt i64 %0, 0
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br i1 %2, label %3, label %4
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3: ; preds = %1
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call void @llvm.trap()
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ret void
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4: ; preds = %1
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ret void
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}
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; Function Attrs: cold noreturn nounwind
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declare void @llvm.trap() #0
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attributes #0 = { cold noreturn nounwind }
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;.
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; CHECK: attributes #[[ATTR0]] = { nounwind }
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; CHECK: attributes #[[ATTR1:[0-9]+]] = { cold noreturn nounwind }
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; CHECK: attributes #[[ATTR2]] = { noreturn }
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;.
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