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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
; RUN: opt -S -passes=jump-threading < %s | FileCheck %s
@f = external global i32
; Make sure the value of @f is reloaded prior to the final comparison.
define i32 @test(i64 %idx, i32 %val) {
; CHECK-LABEL: define i32 @test(
; CHECK-SAME: i64 [[IDX:%.*]], i32 [[VAL:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i64 [[IDX]], 1
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY:%.*]], label [[RETURN:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[F:%.*]] = load i32, ptr @f, align 4
; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[F]], 0
; CHECK-NEXT: br i1 [[CMP1]], label [[COND_END_THREAD:%.*]], label [[COND_END:%.*]]
; CHECK: cond.end:
; CHECK-NEXT: [[CMP_I:%.*]] = icmp sgt i32 [[VAL]], 0
; CHECK-NEXT: [[COND_FR:%.*]] = freeze i1 [[CMP_I]]
; CHECK-NEXT: br i1 [[COND_FR]], label [[COND_END_THREAD]], label [[TMP0:%.*]]
; CHECK: cond.end.thread:
; CHECK-NEXT: br label [[TMP0]]
; CHECK: 0:
; CHECK-NEXT: [[TMP1:%.*]] = phi i32 [ 0, [[COND_END_THREAD]] ], [ [[VAL]], [[COND_END]] ]
; CHECK-NEXT: [[F_IDX:%.*]] = getelementptr inbounds i32, ptr @f, i64 [[IDX]]
; CHECK-NEXT: store i32 [[TMP1]], ptr [[F_IDX]], align 4
; CHECK-NEXT: [[F_RELOAD:%.*]] = load i32, ptr @f, align 4
; CHECK-NEXT: [[CMP3:%.*]] = icmp slt i32 [[F_RELOAD]], 1
; CHECK-NEXT: br i1 [[CMP3]], label [[RETURN2:%.*]], label [[RETURN]]
; CHECK: return:
; CHECK-NEXT: ret i32 0
; CHECK: return2:
; CHECK-NEXT: ret i32 1
;
entry:
%cmp = icmp slt i64 %idx, 1
br i1 %cmp, label %for.body, label %return
for.body:
%f = load i32, ptr @f, align 4
%cmp1 = icmp eq i32 %f, 0
br i1 %cmp1, label %cond.end, label %cond.false
cond.false:
br label %cond.end
cond.end:
%phi = phi i32 [ %val, %cond.false ], [ 1, %for.body ]
%cmp.i = icmp sgt i32 %phi, 0
%sel = select i1 %cmp.i, i32 0, i32 %phi
%f.idx = getelementptr inbounds i32, ptr @f, i64 %idx
store i32 %sel, ptr %f.idx, align 4
%f.reload = load i32, ptr @f, align 4
%cmp3 = icmp slt i32 %f.reload, 1
br i1 %cmp3, label %return2, label %return
return:
ret i32 0
return2:
ret i32 1
}
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