24f4085811
Also add baseline tests to show effect of later patches. There were a couple of regressions here that were never caught, but my patch set that this is a preparation to will fix them. This is the third attempt to land this patch. Differential Revision: https://reviews.llvm.org/D61150 llvm-svn: 363319
49 lines
1.4 KiB
LLVM
49 lines
1.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -simplifycfg -mtriple=arm -mattr=+v6t2 < %s | FileCheck %s
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define i32 @ctlz(i32 %A) {
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; CHECK-LABEL: @ctlz(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i32 [[A:%.*]], 0
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; CHECK-NEXT: [[TMP0:%.*]] = tail call i32 @llvm.ctlz.i32(i32 [[A]], i1 true)
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; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[TOBOOL]], i32 32, i32 [[TMP0]]
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; CHECK-NEXT: ret i32 [[SPEC_SELECT]]
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;
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entry:
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%tobool = icmp eq i32 %A, 0
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br i1 %tobool, label %cond.end, label %cond.true
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cond.true:
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%0 = tail call i32 @llvm.ctlz.i32(i32 %A, i1 true)
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br label %cond.end
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cond.end:
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%cond = phi i32 [ %0, %cond.true ], [ 32, %entry ]
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ret i32 %cond
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}
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define i32 @cttz(i32 %A) {
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; CHECK-LABEL: @cttz(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i32 [[A:%.*]], 0
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; CHECK-NEXT: [[TMP0:%.*]] = tail call i32 @llvm.cttz.i32(i32 [[A]], i1 true)
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; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[TOBOOL]], i32 32, i32 [[TMP0]]
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; CHECK-NEXT: ret i32 [[SPEC_SELECT]]
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;
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entry:
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%tobool = icmp eq i32 %A, 0
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br i1 %tobool, label %cond.end, label %cond.true
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cond.true:
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%0 = tail call i32 @llvm.cttz.i32(i32 %A, i1 true)
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br label %cond.end
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cond.end:
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%cond = phi i32 [ %0, %cond.true ], [ 32, %entry ]
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ret i32 %cond
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}
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declare i32 @llvm.ctlz.i32(i32, i1)
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declare i32 @llvm.cttz.i32(i32, i1)
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