100 lines
4.4 KiB
LLVM
100 lines
4.4 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --check-attributes
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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=4 -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=4 -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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; PR36485
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; musttail call result can't be replaced with a constant, unless the call can be removed
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declare i32 @external()
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define i8* @start(i8 %v) {
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; IS__TUNIT____-LABEL: define {{[^@]+}}@start
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; IS__TUNIT____-SAME: (i8 [[V:%.*]]) {
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; IS__TUNIT____-NEXT: [[C1:%.*]] = icmp eq i8 [[V]], 0
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; IS__TUNIT____-NEXT: br i1 [[C1]], label [[TRUE:%.*]], label [[FALSE:%.*]]
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; IS__TUNIT____: true:
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; IS__TUNIT____-NEXT: [[CA:%.*]] = musttail call i8* @side_effects(i8 [[V]])
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; IS__TUNIT____-NEXT: ret i8* [[CA]]
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; IS__TUNIT____: false:
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; IS__TUNIT____-NEXT: [[C2:%.*]] = icmp eq i8 [[V]], 1
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; IS__TUNIT____-NEXT: br i1 [[C2]], label [[C2_TRUE:%.*]], label [[C2_FALSE:%.*]]
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; IS__TUNIT____: c2_true:
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; IS__TUNIT____-NEXT: ret i8* null
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; IS__TUNIT____: c2_false:
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; IS__TUNIT____-NEXT: [[CA2:%.*]] = musttail call i8* @dont_zap_me(i8 undef)
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; IS__TUNIT____-NEXT: ret i8* [[CA2]]
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;
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; IS__CGSCC____-LABEL: define {{[^@]+}}@start
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; IS__CGSCC____-SAME: (i8 [[V:%.*]]) {
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; IS__CGSCC____-NEXT: [[C1:%.*]] = icmp eq i8 [[V]], 0
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; IS__CGSCC____-NEXT: br i1 [[C1]], label [[TRUE:%.*]], label [[FALSE:%.*]]
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; IS__CGSCC____: true:
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; IS__CGSCC____-NEXT: [[CA:%.*]] = musttail call i8* @side_effects(i8 [[V]])
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; IS__CGSCC____-NEXT: ret i8* [[CA]]
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; IS__CGSCC____: false:
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; IS__CGSCC____-NEXT: [[C2:%.*]] = icmp eq i8 [[V]], 1
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; IS__CGSCC____-NEXT: br i1 [[C2]], label [[C2_TRUE:%.*]], label [[C2_FALSE:%.*]]
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; IS__CGSCC____: c2_true:
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; IS__CGSCC____-NEXT: [[CA1:%.*]] = musttail call i8* @no_side_effects(i8 undef)
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; IS__CGSCC____-NEXT: ret i8* [[CA1]]
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; IS__CGSCC____: c2_false:
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; IS__CGSCC____-NEXT: [[CA2:%.*]] = musttail call i8* @dont_zap_me(i8 undef)
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; IS__CGSCC____-NEXT: ret i8* [[CA2]]
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;
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%c1 = icmp eq i8 %v, 0
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br i1 %c1, label %true, label %false
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true:
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; FIXME: propagate the value information for %v
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%ca = musttail call i8* @side_effects(i8 %v)
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ret i8* %ca
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false:
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%c2 = icmp eq i8 %v, 1
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br i1 %c2, label %c2_true, label %c2_false
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c2_true:
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%ca1 = musttail call i8* @no_side_effects(i8 %v)
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; FIXME: zap this call
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ret i8* %ca1
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c2_false:
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%ca2 = musttail call i8* @dont_zap_me(i8 %v)
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ret i8* %ca2
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}
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define internal i8* @side_effects(i8 %v) {
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; CHECK-LABEL: define {{[^@]+}}@side_effects
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; CHECK-SAME: (i8 [[V:%.*]]) {
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; CHECK-NEXT: [[I1:%.*]] = call i32 @external()
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; CHECK-NEXT: [[CA:%.*]] = musttail call i8* @start(i8 [[V]])
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; CHECK-NEXT: ret i8* [[CA]]
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;
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%i1 = call i32 @external()
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; since this goes back to `start` the SCPP should be see that the return value
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; is always `null`.
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; The call can't be removed due to `external` call above, though.
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%ca = musttail call i8* @start(i8 %v)
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; Thus the result must be returned anyway
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ret i8* %ca
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}
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define internal i8* @no_side_effects(i8 %v) readonly nounwind {
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; IS__CGSCC____: Function Attrs: nofree norecurse nosync nounwind readnone willreturn
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; IS__CGSCC____-LABEL: define {{[^@]+}}@no_side_effects
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; IS__CGSCC____-SAME: (i8 [[V:%.*]]) [[ATTR0:#.*]] {
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; IS__CGSCC____-NEXT: ret i8* undef
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;
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ret i8* null
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}
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define internal i8* @dont_zap_me(i8 %v) {
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; CHECK-LABEL: define {{[^@]+}}@dont_zap_me
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; CHECK-SAME: (i8 [[V:%.*]]) {
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; CHECK-NEXT: [[I1:%.*]] = call i32 @external()
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; CHECK-NEXT: ret i8* undef
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;
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%i1 = call i32 @external()
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ret i8* null
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}
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