derek.holloway
7502bf64a4
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47 lines
1.3 KiB
LLVM
47 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -S -passes=ipsccp %s | FileCheck %s
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; Make sure IPSCCP does not assume %r < 256 for @f1. Undef is passed at a call
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; site, which won't be eliminated.
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define i1 @constant_and_undef(i64 %a) {
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; CHECK-LABEL: define i1 @constant_and_undef(
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; CHECK-SAME: i64 [[A:%.*]]) {
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; CHECK-NEXT: [[C_1:%.*]] = call i1 @f1(i64 undef)
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; CHECK-NEXT: br label %[[BB1:.*]]
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; CHECK: [[BB1]]:
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; CHECK-NEXT: [[C_2:%.*]] = call i1 @f1(i64 10)
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; CHECK-NEXT: br label %[[BB2:.*]]
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; CHECK: [[BB2]]:
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; CHECK-NEXT: [[RANGE:%.*]] = and i64 [[A]], 255
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; CHECK-NEXT: [[C_3:%.*]] = call i1 @f1(i64 [[RANGE]])
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; CHECK-NEXT: ret i1 true
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;
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%c.1 = call i1 @f1(i64 undef)
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br label %bb1
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bb1:
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%c.2 = call i1 @f1(i64 10)
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br label %bb2
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bb2:
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%range = and i64 %a, 255
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%c.3 = call i1 @f1(i64 %range)
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%r.1 = and i1 %c.1, %c.2
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%r.2 = and i1 %r.1, %c.3
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ret i1 %r.2
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}
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declare void @sideeffect(i1, i64 %a)
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define internal i1 @f1(i64 %r) {
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; CHECK-LABEL: define internal i1 @f1(
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; CHECK-SAME: i64 [[R:%.*]]) {
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; CHECK-NEXT: call void @sideeffect(i1 true, i64 [[R]])
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; CHECK-NEXT: ret i1 poison
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;
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%c = icmp ult i64 %r, 256
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call void @sideeffect(i1 %c, i64 %r)
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ret i1 %c
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}
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