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758e067345
Generally, the ISEL is expanded into if-then-else sequence, in some cases (like when the destination register is the same with the true or false value register), it may just be expanded into just the if or else sequence. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@292154 91177308-0d34-0410-b5e6-96231b3b80d8
41 lines
1.4 KiB
LLVM
41 lines
1.4 KiB
LLVM
; RUN: llc -verify-machineinstrs < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 -mattr=-crbits | FileCheck %s
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; RUN: llc -verify-machineinstrs < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 | FileCheck --check-prefix=CHECK-CRB %s
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; RUN: llc -verify-machineinstrs -ppc-gen-isel=false < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 | FileCheck --check-prefix=CHECK-NO-ISEL %s
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target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-v128:128:128-n32:64"
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target triple = "powerpc64-unknown-linux-gnu"
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define i32 @test1(i1 %a, i32 %c) nounwind {
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%x = select i1 %a, i32 %c, i32 0
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ret i32 %x
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; CHECK-LABEL: @test1
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; CHECK-NOT: li {{[0-9]+}}, 0
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; CHECK: isel 3, 0,
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; CHECK: blr
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; CHECK-NO-ISEL-LABEL: @test1
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; CHECK-NO-ISEL: li 3, 0
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; CHECK-NO-ISEL-NEXT: bc 12, 1, [[TRUE:.LBB[0-9]+]]
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; CHECK-NO-ISEL-NEXT: blr
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; CHECK-NO-ISEL-NEXT: [[TRUE]]
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; CHECK-NO-ISEL-NEXT: addi 3, 4, 0
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; CHECK-NO-ISEL-NEXT: blr
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}
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define i32 @test2(i1 %a, i32 %c) nounwind {
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%x = select i1 %a, i32 0, i32 %c
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ret i32 %x
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; CHECK-CRB-LABEL: @test2
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; CHECK-CRB-NOT: li {{[0-9]+}}, 0
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; CHECK-CRB: isel 3, 0,
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; CHECK-CRB: blr
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; CHECK-NO-ISEL-LABEL: @test2
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; CHECK-NO-ISEL: bc 12, 1, [[TRUE:.LBB[0-9]+]]
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; CHECK-NO-ISEL: ori 3, 4, 0
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; CHECK-NO-ISEL-NEXT: blr
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; CHECK-NO-ISEL-NEXT: [[TRUE]]
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; CHECK-NO-ISEL-NEXT: addi 3, 0, 0
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; CHECK-NO-ISEL-NEXT: blr
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}
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