8e901c255d
We can decide whether to expand isel or not in instruction selection pass and early-if-conversion pass. The transformation implemented in PPCExpandISel can be retired considering PPC backend doesn't generate `isel` instructions post-RA. Also if we are seeking performant branch-or-isel decision, we can turn to selectoptimize pass. --------- Co-authored-by: Kai Luo <lkail@cn.ibm.com>
63 lines
2.0 KiB
LLVM
63 lines
2.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
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; 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 -mattr=-isel < %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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; CHECK-LABEL: test1:
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; CHECK: # %bb.0:
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; CHECK-NEXT: andi. 3, 3, 1
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; CHECK-NEXT: iseleq 3, 0, 4
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; CHECK-NEXT: blr
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;
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; CHECK-CRB-LABEL: test1:
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; CHECK-CRB: # %bb.0:
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; CHECK-CRB-NEXT: andi. 3, 3, 1
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; CHECK-CRB-NEXT: li 3, 0
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; CHECK-CRB-NEXT: iselgt 3, 4, 3
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; CHECK-CRB-NEXT: blr
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;
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; CHECK-NO-ISEL-LABEL: test1:
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; CHECK-NO-ISEL: # %bb.0:
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; CHECK-NO-ISEL-NEXT: andi. 3, 3, 1
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; CHECK-NO-ISEL-NEXT: bc 12, 1, .LBB0_2
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; CHECK-NO-ISEL-NEXT: # %bb.1:
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; CHECK-NO-ISEL-NEXT: li 4, 0
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; CHECK-NO-ISEL-NEXT: .LBB0_2:
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; CHECK-NO-ISEL-NEXT: mr 3, 4
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; CHECK-NO-ISEL-NEXT: blr
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%x = select i1 %a, i32 %c, i32 0
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ret i32 %x
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}
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define i32 @test2(i1 %a, i32 %c) nounwind {
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; CHECK-LABEL: test2:
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; CHECK: # %bb.0:
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; CHECK-NEXT: andi. 3, 3, 1
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; CHECK-NEXT: li 3, 0
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; CHECK-NEXT: iseleq 3, 4, 3
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; CHECK-NEXT: blr
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;
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; CHECK-CRB-LABEL: test2:
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; CHECK-CRB: # %bb.0:
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; CHECK-CRB-NEXT: andi. 3, 3, 1
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; CHECK-CRB-NEXT: iselgt 3, 0, 4
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; CHECK-CRB-NEXT: blr
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;
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; CHECK-NO-ISEL-LABEL: test2:
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; CHECK-NO-ISEL: # %bb.0:
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; CHECK-NO-ISEL-NEXT: andi. 3, 3, 1
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; CHECK-NO-ISEL-NEXT: li 3, 0
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; CHECK-NO-ISEL-NEXT: bclr 12, 1, 0
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; CHECK-NO-ISEL-NEXT: # %bb.1:
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; CHECK-NO-ISEL-NEXT: mr 3, 4
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; CHECK-NO-ISEL-NEXT: blr
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%x = select i1 %a, i32 0, i32 %c
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ret i32 %x
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}
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