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[InstCombine] Regenerate phi-preserve-ir-flags.ll test checks to fix issue reported on D77354

This commit is contained in:
Simon Pilgrim 2020-04-08 18:12:55 +01:00
parent b25ec45809
commit 94121c60d6
1 changed files with 49 additions and 16 deletions
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65
llvm/test/Transforms/InstCombine/phi-preserve-ir-flags.ll
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@ -1,9 +1,21 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S -o - | FileCheck %s
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
; CHECK-LABEL: define float @func1(
define float @func1(float %a, float %b, float %c, i1 %cond) {
; CHECK-LABEL: @func1(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[COND_TRUE:%.*]], label [[COND_FALSE:%.*]]
; CHECK: cond.true:
; CHECK-NEXT: br label [[COND_END:%.*]]
; CHECK: cond.false:
; CHECK-NEXT: br label [[COND_END]]
; CHECK: cond.end:
; CHECK-NEXT: [[B_PN:%.*]] = phi float [ [[B:%.*]], [[COND_TRUE]] ], [ [[C:%.*]], [[COND_FALSE]] ]
; CHECK-NEXT: [[E:%.*]] = fsub fast float [[A:%.*]], [[B_PN]]
; CHECK-NEXT: ret float [[E]]
;
entry:
br i1 %cond, label %cond.true, label %cond.false
@ -16,16 +28,24 @@ cond.false:
br label %cond.end
; The fast-math flags should always be transfered if possible.
; CHECK-LABEL: cond.end
; CHECK [[PHI:%[^ ]*]] = phi float [ %b, %cond.true ], [ %c, %cond.false ]
; CHECK fsub fast float %a, [[PHI]]
cond.end:
%e = phi float [ %sub0, %cond.true ], [ %sub1, %cond.false ]
ret float %e
}
; CHECK-LABEL: define float @func2(
define float @func2(float %a, float %b, float %c, i1 %cond) {
; CHECK-LABEL: @func2(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[COND_TRUE:%.*]], label [[COND_FALSE:%.*]]
; CHECK: cond.true:
; CHECK-NEXT: br label [[COND_END:%.*]]
; CHECK: cond.false:
; CHECK-NEXT: br label [[COND_END]]
; CHECK: cond.end:
; CHECK-NEXT: [[B_PN:%.*]] = phi float [ [[B:%.*]], [[COND_TRUE]] ], [ [[C:%.*]], [[COND_FALSE]] ]
; CHECK-NEXT: [[E:%.*]] = fsub float [[A:%.*]], [[B_PN]]
; CHECK-NEXT: ret float [[E]]
;
entry:
br i1 %cond, label %cond.true, label %cond.false
@ -38,16 +58,24 @@ cond.false:
br label %cond.end
; The fast-math flags should always be transfered if possible.
; CHECK-LABEL: cond.end
; CHECK [[PHI:%[^ ]*]] = phi float [ %b, %cond.true ], [ %c, %cond.false ]
; CHECK fsub float %a, [[PHI]]
cond.end:
%e = phi float [ %sub0, %cond.true ], [ %sub1, %cond.false ]
ret float %e
}
; CHECK-LABEL: define float @func3(
define float @func3(float %a, float %b, float %c, i1 %cond) {
; CHECK-LABEL: @func3(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[COND_TRUE:%.*]], label [[COND_FALSE:%.*]]
; CHECK: cond.true:
; CHECK-NEXT: br label [[COND_END:%.*]]
; CHECK: cond.false:
; CHECK-NEXT: br label [[COND_END]]
; CHECK: cond.end:
; CHECK-NEXT: [[E_IN:%.*]] = phi float [ [[A:%.*]], [[COND_TRUE]] ], [ [[B:%.*]], [[COND_FALSE]] ]
; CHECK-NEXT: [[E:%.*]] = fadd fast float [[E_IN]], -2.000000e+00
; CHECK-NEXT: ret float [[E]]
;
entry:
br i1 %cond, label %cond.true, label %cond.false
@ -59,16 +87,24 @@ cond.false:
%sub1 = fsub fast float %b, 2.0
br label %cond.end
; CHECK-LABEL: cond.end
; CHECK [[PHI:%[^ ]*]] = phi float [ %a, %cond.true ], [ %b, %cond.false ]
; CHECK fadd fast float %a, [[PHI]]
cond.end:
%e = phi float [ %sub0, %cond.true ], [ %sub1, %cond.false ]
ret float %e
}
; CHECK-LABEL: define float @func4(
define float @func4(float %a, float %b, float %c, i1 %cond) {
; CHECK-LABEL: @func4(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[COND_TRUE:%.*]], label [[COND_FALSE:%.*]]
; CHECK: cond.true:
; CHECK-NEXT: br label [[COND_END:%.*]]
; CHECK: cond.false:
; CHECK-NEXT: br label [[COND_END]]
; CHECK: cond.end:
; CHECK-NEXT: [[E_IN:%.*]] = phi float [ [[A:%.*]], [[COND_TRUE]] ], [ [[B:%.*]], [[COND_FALSE]] ]
; CHECK-NEXT: [[E:%.*]] = fadd float [[E_IN]], -2.000000e+00
; CHECK-NEXT: ret float [[E]]
;
entry:
br i1 %cond, label %cond.true, label %cond.false
@ -80,9 +116,6 @@ cond.false:
%sub1 = fsub float %b, 2.0
br label %cond.end
; CHECK-LABEL: cond.end
; CHECK [[PHI:%[^ ]*]] = phi float [ %a, %cond.true ], [ %b, %cond.false ]
; CHECK fadd float %a, [[PHI]]
cond.end:
%e = phi float [ %sub0, %cond.true ], [ %sub1, %cond.false ]
ret float %e