| ; 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=4 -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=4 -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_CGSCC_OPM,NOT_CGSCC_NPM,NOT_TUNIT_OPM,IS__TUNIT____,IS________NPM,IS__TUNIT_NPM |
| ; 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 |
| ; 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 |
| ; PR36485 |
| ; musttail call result can't be replaced with a constant, unless the call can be removed |
| |
| declare i32 @external() |
| |
| define i8* @start(i8 %v) { |
| ; IS__TUNIT____-LABEL: define {{[^@]+}}@start |
| ; IS__TUNIT____-SAME: (i8 [[V:%.*]]) { |
| ; IS__TUNIT____-NEXT: [[C1:%.*]] = icmp eq i8 [[V]], 0 |
| ; IS__TUNIT____-NEXT: br i1 [[C1]], label [[TRUE:%.*]], label [[FALSE:%.*]] |
| ; IS__TUNIT____: true: |
| ; IS__TUNIT____-NEXT: [[CA:%.*]] = musttail call i8* @side_effects(i8 [[V]]) |
| ; IS__TUNIT____-NEXT: ret i8* [[CA]] |
| ; IS__TUNIT____: false: |
| ; IS__TUNIT____-NEXT: [[C2:%.*]] = icmp eq i8 [[V]], 1 |
| ; IS__TUNIT____-NEXT: br i1 [[C2]], label [[C2_TRUE:%.*]], label [[C2_FALSE:%.*]] |
| ; IS__TUNIT____: c2_true: |
| ; IS__TUNIT____-NEXT: ret i8* null |
| ; IS__TUNIT____: c2_false: |
| ; IS__TUNIT____-NEXT: [[CA2:%.*]] = musttail call i8* @dont_zap_me(i8 undef) |
| ; IS__TUNIT____-NEXT: ret i8* [[CA2]] |
| ; |
| ; IS__CGSCC____-LABEL: define {{[^@]+}}@start |
| ; IS__CGSCC____-SAME: (i8 [[V:%.*]]) { |
| ; IS__CGSCC____-NEXT: [[C1:%.*]] = icmp eq i8 [[V]], 0 |
| ; IS__CGSCC____-NEXT: br i1 [[C1]], label [[TRUE:%.*]], label [[FALSE:%.*]] |
| ; IS__CGSCC____: true: |
| ; IS__CGSCC____-NEXT: [[CA:%.*]] = musttail call i8* @side_effects(i8 [[V]]) |
| ; IS__CGSCC____-NEXT: ret i8* [[CA]] |
| ; IS__CGSCC____: false: |
| ; IS__CGSCC____-NEXT: [[C2:%.*]] = icmp eq i8 [[V]], 1 |
| ; IS__CGSCC____-NEXT: br i1 [[C2]], label [[C2_TRUE:%.*]], label [[C2_FALSE:%.*]] |
| ; IS__CGSCC____: c2_true: |
| ; IS__CGSCC____-NEXT: [[CA1:%.*]] = musttail call i8* @no_side_effects(i8 undef) |
| ; IS__CGSCC____-NEXT: ret i8* [[CA1]] |
| ; IS__CGSCC____: c2_false: |
| ; IS__CGSCC____-NEXT: [[CA2:%.*]] = musttail call i8* @dont_zap_me(i8 undef) |
| ; IS__CGSCC____-NEXT: ret i8* [[CA2]] |
| ; |
| %c1 = icmp eq i8 %v, 0 |
| br i1 %c1, label %true, label %false |
| true: |
| ; FIXME: propagate the value information for %v |
| %ca = musttail call i8* @side_effects(i8 %v) |
| ret i8* %ca |
| false: |
| %c2 = icmp eq i8 %v, 1 |
| br i1 %c2, label %c2_true, label %c2_false |
| c2_true: |
| %ca1 = musttail call i8* @no_side_effects(i8 %v) |
| ; FIXME: zap this call |
| ret i8* %ca1 |
| c2_false: |
| %ca2 = musttail call i8* @dont_zap_me(i8 %v) |
| ret i8* %ca2 |
| } |
| |
| define internal i8* @side_effects(i8 %v) { |
| ; CHECK-LABEL: define {{[^@]+}}@side_effects |
| ; CHECK-SAME: (i8 [[V:%.*]]) { |
| ; CHECK-NEXT: [[I1:%.*]] = call i32 @external() |
| ; CHECK-NEXT: [[CA:%.*]] = musttail call i8* @start(i8 [[V]]) |
| ; CHECK-NEXT: ret i8* [[CA]] |
| ; |
| %i1 = call i32 @external() |
| |
| ; since this goes back to `start` the SCPP should be see that the return value |
| ; is always `null`. |
| ; The call can't be removed due to `external` call above, though. |
| |
| %ca = musttail call i8* @start(i8 %v) |
| |
| ; Thus the result must be returned anyway |
| ret i8* %ca |
| } |
| |
| define internal i8* @no_side_effects(i8 %v) readonly nounwind { |
| ; IS__CGSCC____: Function Attrs: nofree norecurse nosync nounwind readnone willreturn |
| ; IS__CGSCC____-LABEL: define {{[^@]+}}@no_side_effects |
| ; IS__CGSCC____-SAME: (i8 [[V:%.*]]) [[ATTR0:#.*]] { |
| ; IS__CGSCC____-NEXT: ret i8* undef |
| ; |
| ret i8* null |
| } |
| |
| define internal i8* @dont_zap_me(i8 %v) { |
| ; CHECK-LABEL: define {{[^@]+}}@dont_zap_me |
| ; CHECK-SAME: (i8 [[V:%.*]]) { |
| ; CHECK-NEXT: [[I1:%.*]] = call i32 @external() |
| ; CHECK-NEXT: ret i8* undef |
| ; |
| %i1 = call i32 @external() |
| ret i8* null |
| } |