90 lines
2.3 KiB
LLVM
90 lines
2.3 KiB
LLVM
; RUN: opt < %s -instcombine -S -o - | FileCheck %s
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target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
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; CHECK-LABEL: define float @func1(
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define float @func1(float %a, float %b, float %c, i1 %cond) {
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entry:
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br i1 %cond, label %cond.true, label %cond.false
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cond.true:
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%sub0 = fsub fast float %a, %b
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br label %cond.end
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cond.false:
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%sub1 = fsub fast float %a, %c
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br label %cond.end
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; The fast-math flags should always be transfered if possible.
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; CHECK-LABEL: cond.end
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; CHECK [[PHI:%[^ ]*]] = phi float [ %b, %cond.true ], [ %c, %cond.false ]
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; CHECK fsub fast float %a, [[PHI]]
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cond.end:
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%e = phi float [ %sub0, %cond.true ], [ %sub1, %cond.false ]
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ret float %e
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}
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; CHECK-LABEL: define float @func2(
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define float @func2(float %a, float %b, float %c, i1 %cond) {
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entry:
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br i1 %cond, label %cond.true, label %cond.false
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cond.true:
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%sub0 = fsub fast float %a, %b
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br label %cond.end
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cond.false:
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%sub1 = fsub float %a, %c
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br label %cond.end
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; The fast-math flags should always be transfered if possible.
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; CHECK-LABEL: cond.end
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; CHECK [[PHI:%[^ ]*]] = phi float [ %b, %cond.true ], [ %c, %cond.false ]
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; CHECK fsub float %a, [[PHI]]
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cond.end:
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%e = phi float [ %sub0, %cond.true ], [ %sub1, %cond.false ]
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ret float %e
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}
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; CHECK-LABEL: define float @func3(
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define float @func3(float %a, float %b, float %c, i1 %cond) {
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entry:
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br i1 %cond, label %cond.true, label %cond.false
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cond.true:
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%sub0 = fsub fast float %a, 2.0
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br label %cond.end
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cond.false:
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%sub1 = fsub fast float %b, 2.0
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br label %cond.end
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; CHECK-LABEL: cond.end
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; CHECK [[PHI:%[^ ]*]] = phi float [ %a, %cond.true ], [ %b, %cond.false ]
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; CHECK fadd fast float %a, [[PHI]]
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cond.end:
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%e = phi float [ %sub0, %cond.true ], [ %sub1, %cond.false ]
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ret float %e
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}
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; CHECK-LABEL: define float @func4(
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define float @func4(float %a, float %b, float %c, i1 %cond) {
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entry:
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br i1 %cond, label %cond.true, label %cond.false
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cond.true:
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%sub0 = fsub fast float %a, 2.0
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br label %cond.end
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cond.false:
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%sub1 = fsub float %b, 2.0
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br label %cond.end
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; CHECK-LABEL: cond.end
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; CHECK [[PHI:%[^ ]*]] = phi float [ %a, %cond.true ], [ %b, %cond.false ]
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; CHECK fadd float %a, [[PHI]]
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cond.end:
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%e = phi float [ %sub0, %cond.true ], [ %sub1, %cond.false ]
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ret float %e
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}
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