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llvm-project/llvm/test/Transforms/Attributor/ArgumentPromotion/fp80.ll
Florian Hahn 292077072e
[Local] Treat calls that may not return as being alive. 
With the addition of the `willreturn` attribute, functions that may
not return (e.g. due to an infinite loop) are well defined, if they are
not marked as `willreturn`.

This patch updates `wouldInstructionBeTriviallyDead` to not consider
calls that may not return as dead.

This patch still provides an escape hatch for intrinsics, which are
still assumed as willreturn unconditionally. It will be removed once
all intrinsics definitions have been reviewed and updated.

Reviewed By: jdoerfert

Differential Revision: https://reviews.llvm.org/D94106
2021-01-23 16:05:14 +00:00

165 lines
9.4 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --check-attributes
; RUN: opt -attributor -enable-new-pm=0 -attributor-manifest-internal -attributor-max-iterations-verify -attributor-annotate-decl-cs -attributor-max-iterations=3 -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_CGSCC_NPM,NOT_CGSCC_OPM,NOT_TUNIT_NPM,IS__TUNIT____,IS________OPM,IS__TUNIT_OPM
; RUN: opt -aa-pipeline=basic-aa -passes=attributor -attributor-manifest-internal -attributor-max-iterations-verify -attributor-annotate-decl-cs -attributor-max-iterations=3 -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_CGSCC_OPM,NOT_CGSCC_NPM,NOT_TUNIT_OPM,IS__TUNIT____,IS________NPM,IS__TUNIT_NPM
; TODO: The old pass manager cgscc run is disabled as it causes a crash on windows which is under investigation: http://lab.llvm.org:8011/builders/llvm-clang-x86_64-expensive-checks-win/builds/23151
; 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
; 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
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
%union.u = type { x86_fp80 }
%struct.s = type { double, i16, i8, [5 x i8] }
@b = internal global %struct.s { double 3.14, i16 9439, i8 25, [5 x i8] undef }, align 16
%struct.Foo = type { i32, i64 }
@a = internal global %struct.Foo { i32 1, i64 2 }, align 8
define void @run() {
; IS________OPM: Function Attrs: nofree noreturn nosync nounwind readnone
; IS________OPM-LABEL: define {{[^@]+}}@run
; IS________OPM-SAME: () [[ATTR0:#.*]] {
; IS________OPM-NEXT: entry:
; IS________OPM-NEXT: [[TMP0:%.*]] = call i64 @CaptureAStruct(%struct.Foo* nocapture nofree noundef nonnull readonly align 8 dereferenceable(16) @a) [[ATTR0]]
; IS________OPM-NEXT: unreachable
;
; IS__TUNIT_NPM: Function Attrs: nofree noreturn nosync nounwind readnone
; IS__TUNIT_NPM-LABEL: define {{[^@]+}}@run
; IS__TUNIT_NPM-SAME: () [[ATTR0:#.*]] {
; IS__TUNIT_NPM-NEXT: entry:
; IS__TUNIT_NPM-NEXT: [[A_CAST:%.*]] = bitcast %struct.Foo* @a to i32*
; IS__TUNIT_NPM-NEXT: [[TMP0:%.*]] = load i32, i32* [[A_CAST]], align 8
; IS__TUNIT_NPM-NEXT: [[A_0_1:%.*]] = getelementptr [[STRUCT_FOO:%.*]], %struct.Foo* @a, i32 0, i32 1
; IS__TUNIT_NPM-NEXT: [[TMP1:%.*]] = load i64, i64* [[A_0_1]], align 8
; IS__TUNIT_NPM-NEXT: [[TMP2:%.*]] = call i64 @CaptureAStruct(i32 [[TMP0]], i64 [[TMP1]]) [[ATTR0]]
; IS__TUNIT_NPM-NEXT: unreachable
;
; IS__CGSCC____: Function Attrs: nofree norecurse noreturn nosync nounwind readonly willreturn
; IS__CGSCC____-LABEL: define {{[^@]+}}@run
; IS__CGSCC____-SAME: () [[ATTR0:#.*]] {
; IS__CGSCC____-NEXT: entry:
; IS__CGSCC____-NEXT: [[A_CAST:%.*]] = bitcast %struct.Foo* @a to i32*
; IS__CGSCC____-NEXT: [[TMP0:%.*]] = load i32, i32* [[A_CAST]], align 8
; IS__CGSCC____-NEXT: [[A_0_1:%.*]] = getelementptr [[STRUCT_FOO:%.*]], %struct.Foo* @a, i32 0, i32 1
; IS__CGSCC____-NEXT: [[TMP1:%.*]] = load i64, i64* [[A_0_1]], align 8
; IS__CGSCC____-NEXT: unreachable
;
entry:
tail call i8 @UseLongDoubleUnsafely(%union.u* byval(%union.u) align 16 bitcast (%struct.s* @b to %union.u*))
tail call x86_fp80 @UseLongDoubleSafely(%union.u* byval(%union.u) align 16 bitcast (%struct.s* @b to %union.u*))
call i64 @AccessPaddingOfStruct(%struct.Foo* @a)
call i64 @CaptureAStruct(%struct.Foo* @a)
ret void
}
define internal i8 @UseLongDoubleUnsafely(%union.u* byval(%union.u) align 16 %arg) {
; IS__CGSCC____: Function Attrs: nofree norecurse nosync nounwind readnone willreturn
; IS__CGSCC____-LABEL: define {{[^@]+}}@UseLongDoubleUnsafely
; IS__CGSCC____-SAME: () [[ATTR1:#.*]] {
; IS__CGSCC____-NEXT: entry:
; IS__CGSCC____-NEXT: ret i8 undef
;
entry:
%bitcast = bitcast %union.u* %arg to %struct.s*
%gep = getelementptr inbounds %struct.s, %struct.s* %bitcast, i64 0, i32 2
%result = load i8, i8* %gep
ret i8 %result
}
define internal x86_fp80 @UseLongDoubleSafely(%union.u* byval(%union.u) align 16 %arg) {
; IS__CGSCC____: Function Attrs: nofree norecurse nosync nounwind readnone willreturn
; IS__CGSCC____-LABEL: define {{[^@]+}}@UseLongDoubleSafely
; IS__CGSCC____-SAME: () [[ATTR1]] {
; IS__CGSCC____-NEXT: ret x86_fp80 undef
;
%gep = getelementptr inbounds %union.u, %union.u* %arg, i64 0, i32 0
%fp80 = load x86_fp80, x86_fp80* %gep
ret x86_fp80 %fp80
}
define internal i64 @AccessPaddingOfStruct(%struct.Foo* byval(%struct.Foo) %a) {
; IS__CGSCC____: Function Attrs: nofree norecurse nosync nounwind readnone willreturn
; IS__CGSCC____-LABEL: define {{[^@]+}}@AccessPaddingOfStruct
; IS__CGSCC____-SAME: () [[ATTR1]] {
; IS__CGSCC____-NEXT: ret i64 undef
;
%p = bitcast %struct.Foo* %a to i64*
%v = load i64, i64* %p
ret i64 %v
}
define internal i64 @CaptureAStruct(%struct.Foo* byval(%struct.Foo) %a) {
; IS__CGSCC_OPM-LABEL: define {{[^@]+}}@CaptureAStruct
; IS__CGSCC_OPM-SAME: (%struct.Foo* noalias nofree byval(%struct.Foo) [[A:%.*]])
; IS__CGSCC_OPM-NEXT: entry:
; IS__CGSCC_OPM-NEXT: [[A_PTR:%.*]] = alloca %struct.Foo*
; IS__CGSCC_OPM-NEXT: br label [[LOOP:%.*]]
; IS__CGSCC_OPM: loop:
; IS__CGSCC_OPM-NEXT: [[PHI:%.*]] = phi %struct.Foo* [ null, [[ENTRY:%.*]] ], [ [[GEP:%.*]], [[LOOP]] ]
; IS__CGSCC_OPM-NEXT: [[TMP0:%.*]] = phi %struct.Foo* [ [[A]], [[ENTRY]] ], [ [[TMP0]], [[LOOP]] ]
; IS__CGSCC_OPM-NEXT: store %struct.Foo* [[PHI]], %struct.Foo** [[A_PTR]], align 8
; IS__CGSCC_OPM-NEXT: [[GEP]] = getelementptr [[STRUCT_FOO:%.*]], %struct.Foo* [[A]], i64 0
; IS__CGSCC_OPM-NEXT: br label [[LOOP]]
;
; IS________OPM: Function Attrs: nofree noreturn nosync nounwind readnone
; IS________OPM-LABEL: define {{[^@]+}}@CaptureAStruct
; IS________OPM-SAME: (%struct.Foo* noalias nofree noundef nonnull byval(%struct.Foo) align 8 dereferenceable(16) [[A:%.*]]) [[ATTR0]] {
; IS________OPM-NEXT: entry:
; IS________OPM-NEXT: [[A_PTR:%.*]] = alloca %struct.Foo*, align 8
; IS________OPM-NEXT: br label [[LOOP:%.*]]
; IS________OPM: loop:
; IS________OPM-NEXT: [[PHI:%.*]] = phi %struct.Foo* [ null, [[ENTRY:%.*]] ], [ [[GEP:%.*]], [[LOOP]] ]
; IS________OPM-NEXT: [[TMP0:%.*]] = phi %struct.Foo* [ [[A]], [[ENTRY]] ], [ [[TMP0]], [[LOOP]] ]
; IS________OPM-NEXT: store %struct.Foo* [[PHI]], %struct.Foo** [[A_PTR]], align 8
; IS________OPM-NEXT: [[GEP]] = getelementptr [[STRUCT_FOO:%.*]], %struct.Foo* [[A]], i64 0
; IS________OPM-NEXT: br label [[LOOP]]
;
; IS__TUNIT_NPM: Function Attrs: nofree noreturn nosync nounwind readnone
; IS__TUNIT_NPM-LABEL: define {{[^@]+}}@CaptureAStruct
; IS__TUNIT_NPM-SAME: (i32 [[TMP0:%.*]], i64 [[TMP1:%.*]]) [[ATTR0]] {
; IS__TUNIT_NPM-NEXT: entry:
; IS__TUNIT_NPM-NEXT: [[A_PRIV:%.*]] = alloca [[STRUCT_FOO:%.*]], align 8
; IS__TUNIT_NPM-NEXT: [[A_PRIV_CAST:%.*]] = bitcast %struct.Foo* [[A_PRIV]] to i32*
; IS__TUNIT_NPM-NEXT: store i32 [[TMP0]], i32* [[A_PRIV_CAST]], align 4
; IS__TUNIT_NPM-NEXT: [[A_PRIV_0_1:%.*]] = getelementptr [[STRUCT_FOO]], %struct.Foo* [[A_PRIV]], i32 0, i32 1
; IS__TUNIT_NPM-NEXT: store i64 [[TMP1]], i64* [[A_PRIV_0_1]], align 8
; IS__TUNIT_NPM-NEXT: [[A_PTR:%.*]] = alloca %struct.Foo*, align 8
; IS__TUNIT_NPM-NEXT: br label [[LOOP:%.*]]
; IS__TUNIT_NPM: loop:
; IS__TUNIT_NPM-NEXT: [[PHI:%.*]] = phi %struct.Foo* [ null, [[ENTRY:%.*]] ], [ [[GEP:%.*]], [[LOOP]] ]
; IS__TUNIT_NPM-NEXT: [[TMP2:%.*]] = phi %struct.Foo* [ [[A_PRIV]], [[ENTRY]] ], [ [[TMP2]], [[LOOP]] ]
; IS__TUNIT_NPM-NEXT: store %struct.Foo* [[PHI]], %struct.Foo** [[A_PTR]], align 8
; IS__TUNIT_NPM-NEXT: [[GEP]] = getelementptr [[STRUCT_FOO]], %struct.Foo* [[A_PRIV]], i64 0
; IS__TUNIT_NPM-NEXT: br label [[LOOP]]
;
; IS__CGSCC____: Function Attrs: nofree norecurse noreturn nosync nounwind readnone
; IS__CGSCC____-LABEL: define {{[^@]+}}@CaptureAStruct
; IS__CGSCC____-SAME: (i32 [[TMP0:%.*]], i64 [[TMP1:%.*]]) [[ATTR2:#.*]] {
; IS__CGSCC____-NEXT: entry:
; IS__CGSCC____-NEXT: [[A_PRIV:%.*]] = alloca [[STRUCT_FOO:%.*]], align 8
; IS__CGSCC____-NEXT: [[A_PRIV_CAST:%.*]] = bitcast %struct.Foo* [[A_PRIV]] to i32*
; IS__CGSCC____-NEXT: store i32 [[TMP0]], i32* [[A_PRIV_CAST]], align 8
; IS__CGSCC____-NEXT: [[A_PRIV_0_1:%.*]] = getelementptr [[STRUCT_FOO]], %struct.Foo* [[A_PRIV]], i32 0, i32 1
; IS__CGSCC____-NEXT: store i64 [[TMP1]], i64* [[A_PRIV_0_1]], align 8
; IS__CGSCC____-NEXT: [[A_PTR:%.*]] = alloca %struct.Foo*, align 8
; IS__CGSCC____-NEXT: br label [[LOOP:%.*]]
; IS__CGSCC____: loop:
; IS__CGSCC____-NEXT: [[PHI:%.*]] = phi %struct.Foo* [ null, [[ENTRY:%.*]] ], [ [[GEP:%.*]], [[LOOP]] ]
; IS__CGSCC____-NEXT: [[TMP2:%.*]] = phi %struct.Foo* [ [[A_PRIV]], [[ENTRY]] ], [ [[TMP2]], [[LOOP]] ]
; IS__CGSCC____-NEXT: store %struct.Foo* [[PHI]], %struct.Foo** [[A_PTR]], align 8
; IS__CGSCC____-NEXT: [[GEP]] = getelementptr [[STRUCT_FOO]], %struct.Foo* [[A_PRIV]], i64 0
; IS__CGSCC____-NEXT: br label [[LOOP]]
;
entry:
%a_ptr = alloca %struct.Foo*
br label %loop
loop:
%phi = phi %struct.Foo* [ null, %entry ], [ %gep, %loop ]
%0 = phi %struct.Foo* [ %a, %entry ], [ %0, %loop ]
store %struct.Foo* %phi, %struct.Foo** %a_ptr
%gep = getelementptr %struct.Foo, %struct.Foo* %a, i64 0
br label %loop
}
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