49 lines
1.4 KiB
LLVM
49 lines
1.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt -S -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -mtriple=arm -mattr=+v6t2 < %s | FileCheck %s
|
|
|
|
define i32 @ctlz(i32 %A) {
|
|
; CHECK-LABEL: @ctlz(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i32 [[A:%.*]], 0
|
|
; CHECK-NEXT: [[TMP0:%.*]] = tail call i32 @llvm.ctlz.i32(i32 [[A]], i1 true)
|
|
; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[TOBOOL]], i32 32, i32 [[TMP0]]
|
|
; CHECK-NEXT: ret i32 [[SPEC_SELECT]]
|
|
;
|
|
entry:
|
|
%tobool = icmp eq i32 %A, 0
|
|
br i1 %tobool, label %cond.end, label %cond.true
|
|
|
|
cond.true:
|
|
%0 = tail call i32 @llvm.ctlz.i32(i32 %A, i1 true)
|
|
br label %cond.end
|
|
|
|
cond.end:
|
|
%cond = phi i32 [ %0, %cond.true ], [ 32, %entry ]
|
|
ret i32 %cond
|
|
}
|
|
|
|
define i32 @cttz(i32 %A) {
|
|
; CHECK-LABEL: @cttz(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i32 [[A:%.*]], 0
|
|
; CHECK-NEXT: [[TMP0:%.*]] = tail call i32 @llvm.cttz.i32(i32 [[A]], i1 true)
|
|
; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[TOBOOL]], i32 32, i32 [[TMP0]]
|
|
; CHECK-NEXT: ret i32 [[SPEC_SELECT]]
|
|
;
|
|
entry:
|
|
%tobool = icmp eq i32 %A, 0
|
|
br i1 %tobool, label %cond.end, label %cond.true
|
|
|
|
cond.true:
|
|
%0 = tail call i32 @llvm.cttz.i32(i32 %A, i1 true)
|
|
br label %cond.end
|
|
|
|
cond.end:
|
|
%cond = phi i32 [ %0, %cond.true ], [ 32, %entry ]
|
|
ret i32 %cond
|
|
}
|
|
|
|
declare i32 @llvm.ctlz.i32(i32, i1)
|
|
declare i32 @llvm.cttz.i32(i32, i1)
|
|
|