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8028ab057e
Iff we know the sigdness domain of the argument, we can either skip @llvm.abs, or do negation directly. Notably, INT_MIN can belong to either domain: * X u<= INT_MIN --> X is always fine https://alive2.llvm.org/ce/z/QB8j-C https://alive2.llvm.org/ce/z/7sFKpS * X s<= 0 --> -X is always fine https://alive2.llvm.org/ce/z/QbGSyq https://alive2.llvm.org/ce/z/APsN84 If all else fails, try to inferr NSW flag: https://alive2.llvm.org/ce/z/qCJfYm
124 lines
3.7 KiB
LLVM
124 lines
3.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -correlated-propagation < %s | FileCheck %s
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declare i32 @llvm.umin.i32(i32, i32)
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declare i32 @llvm.umax.i32(i32, i32)
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declare i32 @llvm.smin.i32(i32, i32)
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declare i32 @llvm.smax.i32(i32, i32)
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declare i32 @llvm.abs.i32(i32, i1)
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declare void @use(i1)
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define void @test_umin(i32 %x) {
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; CHECK-LABEL: @test_umin(
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; CHECK-NEXT: [[M:%.*]] = call i32 @llvm.umin.i32(i32 [[X:%.*]], i32 10)
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: [[C2:%.*]] = icmp ult i32 [[M]], 10
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; CHECK-NEXT: call void @use(i1 [[C2]])
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; CHECK-NEXT: ret void
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;
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%m = call i32 @llvm.umin.i32(i32 %x, i32 10)
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%c1 = icmp ule i32 %m, 10
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call void @use(i1 %c1)
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%c2 = icmp ult i32 %m, 10
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call void @use(i1 %c2)
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ret void
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}
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define void @test_umax(i32 %x) {
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; CHECK-LABEL: @test_umax(
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; CHECK-NEXT: [[M:%.*]] = call i32 @llvm.umax.i32(i32 [[X:%.*]], i32 10)
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: [[C2:%.*]] = icmp ugt i32 [[M]], 10
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; CHECK-NEXT: call void @use(i1 [[C2]])
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; CHECK-NEXT: ret void
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;
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%m = call i32 @llvm.umax.i32(i32 %x, i32 10)
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%c1 = icmp uge i32 %m, 10
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call void @use(i1 %c1)
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%c2 = icmp ugt i32 %m, 10
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call void @use(i1 %c2)
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ret void
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}
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define void @test_smin(i32 %x) {
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; CHECK-LABEL: @test_smin(
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; CHECK-NEXT: [[M:%.*]] = call i32 @llvm.smin.i32(i32 [[X:%.*]], i32 10)
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: [[C2:%.*]] = icmp slt i32 [[M]], 10
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; CHECK-NEXT: call void @use(i1 [[C2]])
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; CHECK-NEXT: ret void
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;
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%m = call i32 @llvm.smin.i32(i32 %x, i32 10)
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%c1 = icmp sle i32 %m, 10
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call void @use(i1 %c1)
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%c2 = icmp slt i32 %m, 10
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call void @use(i1 %c2)
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ret void
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}
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define void @test_smax(i32 %x) {
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; CHECK-LABEL: @test_smax(
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; CHECK-NEXT: [[M:%.*]] = call i32 @llvm.smax.i32(i32 [[X:%.*]], i32 10)
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: [[C2:%.*]] = icmp sgt i32 [[M]], 10
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; CHECK-NEXT: call void @use(i1 [[C2]])
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; CHECK-NEXT: ret void
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;
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%m = call i32 @llvm.smax.i32(i32 %x, i32 10)
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%c1 = icmp sge i32 %m, 10
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call void @use(i1 %c1)
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%c2 = icmp sgt i32 %m, 10
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call void @use(i1 %c2)
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ret void
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}
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define void @test_abs1(i32* %p) {
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; CHECK-LABEL: @test_abs1(
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; CHECK-NEXT: [[X:%.*]] = load i32, i32* [[P:%.*]], align 4, !range [[RNG0:![0-9]+]]
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; CHECK-NEXT: [[A:%.*]] = call i32 @llvm.abs.i32(i32 [[X]], i1 true)
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: [[C2:%.*]] = icmp ult i32 [[A]], 15
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; CHECK-NEXT: call void @use(i1 [[C2]])
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; CHECK-NEXT: ret void
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;
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%x = load i32, i32* %p, !range !{i32 -15, i32 10}
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%a = call i32 @llvm.abs.i32(i32 %x, i1 false)
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%c1 = icmp ule i32 %a, 15
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call void @use(i1 %c1)
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%c2 = icmp ult i32 %a, 15
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call void @use(i1 %c2)
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ret void
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}
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define void @test_abs2(i32 %x) {
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; CHECK-LABEL: @test_abs2(
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; CHECK-NEXT: [[A:%.*]] = call i32 @llvm.abs.i32(i32 [[X:%.*]], i1 false)
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: [[C2:%.*]] = icmp ult i32 [[A]], -2147483648
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; CHECK-NEXT: call void @use(i1 [[C2]])
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; CHECK-NEXT: ret void
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;
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%a = call i32 @llvm.abs.i32(i32 %x, i1 false)
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%c1 = icmp ule i32 %a, 2147483648
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call void @use(i1 %c1)
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%c2 = icmp ult i32 %a, 2147483648
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call void @use(i1 %c2)
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ret void
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}
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define void @test_abs3(i32 %x) {
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; CHECK-LABEL: @test_abs3(
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; CHECK-NEXT: [[A:%.*]] = call i32 @llvm.abs.i32(i32 [[X:%.*]], i1 true)
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: [[C2:%.*]] = icmp sgt i32 [[A]], 0
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; CHECK-NEXT: call void @use(i1 [[C2]])
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; CHECK-NEXT: ret void
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;
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%a = call i32 @llvm.abs.i32(i32 %x, i1 true)
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%c1 = icmp sge i32 %a, 0
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call void @use(i1 %c1)
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%c2 = icmp sgt i32 %a, 0
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call void @use(i1 %c2)
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ret void
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}
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