396 lines
10 KiB
LLVM
396 lines
10 KiB
LLVM
; RUN: opt -S -instcombine < %s | FileCheck %s
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declare void @use(i32)
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; These 18 exercise all combinations of signed comparison
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; for each of the three values produced by your typical
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; 3way compare function (-1, 0, 1)
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define void @test_low_sgt(i64 %a, i64 %b) {
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; CHECK-LABEL: @test_low_sgt
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; CHECK: [[TMP1:%.*]] = icmp slt i64 %a, %b
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; CHECK: br i1 [[TMP1]], label %normal, label %unreached
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%eq = icmp eq i64 %a, %b
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%slt = icmp slt i64 %a, %b
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%. = select i1 %slt, i32 -1, i32 1
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%result = select i1 %eq, i32 0, i32 %.
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%cmp = icmp sgt i32 %result, -1
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br i1 %cmp, label %unreached, label %normal
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normal:
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ret void
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unreached:
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call void @use(i32 %result)
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ret void
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}
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define void @test_low_slt(i64 %a, i64 %b) {
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; CHECK-LABEL: @test_low_slt
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; CHECK: br i1 false, label %unreached, label %normal
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%eq = icmp eq i64 %a, %b
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%slt = icmp slt i64 %a, %b
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%. = select i1 %slt, i32 -1, i32 1
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%result = select i1 %eq, i32 0, i32 %.
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%cmp = icmp slt i32 %result, -1
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br i1 %cmp, label %unreached, label %normal
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normal:
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ret void
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unreached:
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call void @use(i32 %result)
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ret void
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}
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define void @test_low_sge(i64 %a, i64 %b) {
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; CHECK-LABEL: @test_low_sge
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; CHECK: br i1 true, label %unreached, label %normal
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%eq = icmp eq i64 %a, %b
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%slt = icmp slt i64 %a, %b
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%. = select i1 %slt, i32 -1, i32 1
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%result = select i1 %eq, i32 0, i32 %.
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%cmp = icmp sge i32 %result, -1
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br i1 %cmp, label %unreached, label %normal
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normal:
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ret void
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unreached:
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call void @use(i32 %result)
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ret void
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}
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define void @test_low_sle(i64 %a, i64 %b) {
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; CHECK-LABEL: @test_low_sle
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; CHECK: [[TMP1:%.*]] = icmp slt i64 %a, %b
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; CHECK: br i1 [[TMP1]], label %unreached, label %normal
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%eq = icmp eq i64 %a, %b
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%slt = icmp slt i64 %a, %b
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%. = select i1 %slt, i32 -1, i32 1
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%result = select i1 %eq, i32 0, i32 %.
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%cmp = icmp sle i32 %result, -1
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br i1 %cmp, label %unreached, label %normal
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normal:
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ret void
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unreached:
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call void @use(i32 %result)
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ret void
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}
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define void @test_low_ne(i64 %a, i64 %b) {
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; CHECK-LABEL: @test_low_ne
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; CHECK: [[TMP1:%.*]] = icmp slt i64 %a, %b
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; CHECK: br i1 [[TMP1]], label %normal, label %unreached
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%eq = icmp eq i64 %a, %b
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%slt = icmp slt i64 %a, %b
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%. = select i1 %slt, i32 -1, i32 1
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%result = select i1 %eq, i32 0, i32 %.
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%cmp = icmp ne i32 %result, -1
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br i1 %cmp, label %unreached, label %normal
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normal:
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ret void
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unreached:
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call void @use(i32 %result)
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ret void
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}
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define void @test_low_eq(i64 %a, i64 %b) {
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; CHECK-LABEL: @test_low_eq
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; CHECK: [[TMP1:%.*]] = icmp slt i64 %a, %b
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; CHECK: br i1 [[TMP1]], label %unreached, label %normal
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%eq = icmp eq i64 %a, %b
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%slt = icmp slt i64 %a, %b
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%. = select i1 %slt, i32 -1, i32 1
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%result = select i1 %eq, i32 0, i32 %.
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%cmp = icmp eq i32 %result, -1
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br i1 %cmp, label %unreached, label %normal
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normal:
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ret void
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unreached:
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call void @use(i32 %result)
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ret void
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}
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define void @test_mid_sgt(i64 %a, i64 %b) {
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; CHECK-LABEL: @test_mid_sgt
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; CHECK: [[TMP1:%.*]] = icmp sgt i64 %a, %b
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; CHECK: br i1 [[TMP1]], label %unreached, label %normal
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%eq = icmp eq i64 %a, %b
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%slt = icmp slt i64 %a, %b
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%. = select i1 %slt, i32 -1, i32 1
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%result = select i1 %eq, i32 0, i32 %.
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%cmp = icmp sgt i32 %result, 0
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br i1 %cmp, label %unreached, label %normal
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normal:
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ret void
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unreached:
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call void @use(i32 %result)
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ret void
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}
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define void @test_mid_slt(i64 %a, i64 %b) {
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; CHECK-LABEL: @test_mid_slt
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; CHECK: [[TMP1:%.*]] = icmp slt i64 %a, %b
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; CHECK: br i1 [[TMP1]], label %unreached, label %normal
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%eq = icmp eq i64 %a, %b
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%slt = icmp slt i64 %a, %b
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%. = select i1 %slt, i32 -1, i32 1
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%result = select i1 %eq, i32 0, i32 %.
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%cmp = icmp slt i32 %result, 0
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br i1 %cmp, label %unreached, label %normal
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normal:
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ret void
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unreached:
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call void @use(i32 %result)
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ret void
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}
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define void @test_mid_sge(i64 %a, i64 %b) {
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; CHECK-LABEL: @test_mid_sge
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; CHECK: [[TMP1:%.*]] = icmp slt i64 %a, %b
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; CHECK: br i1 [[TMP1]], label %normal, label %unreached
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%eq = icmp eq i64 %a, %b
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%slt = icmp slt i64 %a, %b
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%. = select i1 %slt, i32 -1, i32 1
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%result = select i1 %eq, i32 0, i32 %.
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%cmp = icmp sge i32 %result, 0
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br i1 %cmp, label %unreached, label %normal
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normal:
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ret void
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unreached:
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call void @use(i32 %result)
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ret void
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}
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define void @test_mid_sle(i64 %a, i64 %b) {
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; CHECK-LABEL: @test_mid_sle
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; CHECK: [[TMP1:%.*]] = icmp sgt i64 %a, %b
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; CHECK: br i1 [[TMP1]], label %normal, label %unreached
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%eq = icmp eq i64 %a, %b
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%slt = icmp slt i64 %a, %b
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%. = select i1 %slt, i32 -1, i32 1
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%result = select i1 %eq, i32 0, i32 %.
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%cmp = icmp sle i32 %result, 0
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br i1 %cmp, label %unreached, label %normal
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normal:
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ret void
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unreached:
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call void @use(i32 %result)
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ret void
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}
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define void @test_mid_ne(i64 %a, i64 %b) {
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; CHECK-LABEL: @test_mid_ne
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; CHECK: [[TMP1:%.*]] = icmp eq i64 %a, %b
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; CHECK: br i1 [[TMP1]], label %normal, label %unreached
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%eq = icmp eq i64 %a, %b
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%slt = icmp slt i64 %a, %b
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%. = select i1 %slt, i32 -1, i32 1
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%result = select i1 %eq, i32 0, i32 %.
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%cmp = icmp ne i32 %result, 0
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br i1 %cmp, label %unreached, label %normal
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normal:
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ret void
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unreached:
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call void @use(i32 %result)
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ret void
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}
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define void @test_mid_eq(i64 %a, i64 %b) {
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; CHECK-LABEL: @test_mid_eq
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; CHECK: icmp eq i64 %a, %b
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; CHECK: br i1 %eq, label %unreached, label %normal
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%eq = icmp eq i64 %a, %b
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%slt = icmp slt i64 %a, %b
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%. = select i1 %slt, i32 -1, i32 1
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%result = select i1 %eq, i32 0, i32 %.
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%cmp = icmp eq i32 %result, 0
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br i1 %cmp, label %unreached, label %normal
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normal:
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ret void
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unreached:
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call void @use(i32 %result)
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ret void
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}
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define void @test_high_sgt(i64 %a, i64 %b) {
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; CHECK-LABEL: @test_high_sgt
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; CHECK: br i1 false, label %unreached, label %normal
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%eq = icmp eq i64 %a, %b
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%slt = icmp slt i64 %a, %b
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%. = select i1 %slt, i32 -1, i32 1
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%result = select i1 %eq, i32 0, i32 %.
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%cmp = icmp sgt i32 %result, 1
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br i1 %cmp, label %unreached, label %normal
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normal:
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ret void
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unreached:
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call void @use(i32 %result)
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ret void
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}
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define void @test_high_slt(i64 %a, i64 %b) {
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; CHECK-LABEL: @test_high_slt
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; CHECK: [[TMP1:%.*]] = icmp sgt i64 %a, %b
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; CHECK: br i1 [[TMP1]], label %normal, label %unreached
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%eq = icmp eq i64 %a, %b
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%slt = icmp slt i64 %a, %b
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%. = select i1 %slt, i32 -1, i32 1
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%result = select i1 %eq, i32 0, i32 %.
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%cmp = icmp slt i32 %result, 1
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br i1 %cmp, label %unreached, label %normal
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normal:
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ret void
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unreached:
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call void @use(i32 %result)
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ret void
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}
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define void @test_high_sge(i64 %a, i64 %b) {
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; CHECK-LABEL: @test_high_sge
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; CHECK: [[TMP1:%.*]] = icmp sgt i64 %a, %b
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; CHECK: br i1 [[TMP1]], label %unreached, label %normal
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%eq = icmp eq i64 %a, %b
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%slt = icmp slt i64 %a, %b
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%. = select i1 %slt, i32 -1, i32 1
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%result = select i1 %eq, i32 0, i32 %.
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%cmp = icmp sge i32 %result, 1
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br i1 %cmp, label %unreached, label %normal
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normal:
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ret void
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unreached:
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call void @use(i32 %result)
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ret void
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}
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define void @test_high_sle(i64 %a, i64 %b) {
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; CHECK-LABEL: @test_high_sle
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; CHECK: br i1 true, label %unreached, label %normal
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%eq = icmp eq i64 %a, %b
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%slt = icmp slt i64 %a, %b
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%. = select i1 %slt, i32 -1, i32 1
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%result = select i1 %eq, i32 0, i32 %.
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%cmp = icmp sle i32 %result, 1
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br i1 %cmp, label %unreached, label %normal
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normal:
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ret void
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unreached:
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call void @use(i32 %result)
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ret void
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}
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define void @test_high_ne(i64 %a, i64 %b) {
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; CHECK-LABEL: @test_high_ne
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; CHECK: [[TMP1:%.*]] = icmp sgt i64 %a, %b
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; CHECK: br i1 [[TMP1]], label %normal, label %unreached
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%eq = icmp eq i64 %a, %b
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%slt = icmp slt i64 %a, %b
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%. = select i1 %slt, i32 -1, i32 1
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%result = select i1 %eq, i32 0, i32 %.
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%cmp = icmp ne i32 %result, 1
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br i1 %cmp, label %unreached, label %normal
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normal:
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ret void
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unreached:
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call void @use(i32 %result)
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ret void
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}
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define void @test_high_eq(i64 %a, i64 %b) {
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; CHECK-LABEL: @test_high_eq
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; CHECK: [[TMP1:%.*]] = icmp sgt i64 %a, %b
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; CHECK: br i1 [[TMP1]], label %unreached, label %normal
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%eq = icmp eq i64 %a, %b
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%slt = icmp slt i64 %a, %b
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%. = select i1 %slt, i32 -1, i32 1
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%result = select i1 %eq, i32 0, i32 %.
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%cmp = icmp eq i32 %result, 1
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br i1 %cmp, label %unreached, label %normal
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normal:
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ret void
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unreached:
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call void @use(i32 %result)
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ret void
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}
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; These five make sure we didn't accidentally hard code one of the
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; produced values
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define void @non_standard_low(i64 %a, i64 %b) {
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; CHECK-LABEL: @non_standard_low
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; CHECK: [[TMP1:%.*]] = icmp slt i64 %a, %b
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; CHECK: br i1 [[TMP1]], label %unreached, label %normal
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%eq = icmp eq i64 %a, %b
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%slt = icmp slt i64 %a, %b
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%. = select i1 %slt, i32 -3, i32 -1
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%result = select i1 %eq, i32 -2, i32 %.
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%cmp = icmp eq i32 %result, -3
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br i1 %cmp, label %unreached, label %normal
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normal:
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ret void
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unreached:
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call void @use(i32 %result)
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ret void
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}
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define void @non_standard_mid(i64 %a, i64 %b) {
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; CHECK-LABEL: @non_standard_mid
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; CHECK: icmp eq i64 %a, %b
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; CHECK: br i1 %eq, label %unreached, label %normal
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%eq = icmp eq i64 %a, %b
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%slt = icmp slt i64 %a, %b
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%. = select i1 %slt, i32 -3, i32 -1
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%result = select i1 %eq, i32 -2, i32 %.
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%cmp = icmp eq i32 %result, -2
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br i1 %cmp, label %unreached, label %normal
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normal:
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ret void
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unreached:
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call void @use(i32 %result)
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ret void
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}
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define void @non_standard_high(i64 %a, i64 %b) {
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; CHECK-LABEL: @non_standard_high
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; CHECK: [[TMP1:%.*]] = icmp sgt i64 %a, %b
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; CHECK: br i1 [[TMP1]], label %unreached, label %normal
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%eq = icmp eq i64 %a, %b
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%slt = icmp slt i64 %a, %b
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%. = select i1 %slt, i32 -3, i32 -1
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%result = select i1 %eq, i32 -2, i32 %.
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%cmp = icmp eq i32 %result, -1
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br i1 %cmp, label %unreached, label %normal
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normal:
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ret void
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unreached:
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call void @use(i32 %result)
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ret void
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}
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define void @non_standard_bound1(i64 %a, i64 %b) {
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; CHECK-LABEL: @non_standard_bound1
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; CHECK: br i1 false, label %unreached, label %normal
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%eq = icmp eq i64 %a, %b
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%slt = icmp slt i64 %a, %b
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%. = select i1 %slt, i32 -3, i32 -1
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%result = select i1 %eq, i32 -2, i32 %.
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%cmp = icmp eq i32 %result, -20
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br i1 %cmp, label %unreached, label %normal
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normal:
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ret void
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unreached:
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call void @use(i32 %result)
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ret void
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}
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define void @non_standard_bound2(i64 %a, i64 %b) {
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; CHECK-LABEL: @non_standard_bound2
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; CHECK: br i1 false, label %unreached, label %normal
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%eq = icmp eq i64 %a, %b
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%slt = icmp slt i64 %a, %b
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%. = select i1 %slt, i32 -3, i32 -1
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%result = select i1 %eq, i32 -2, i32 %.
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%cmp = icmp eq i32 %result, 0
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br i1 %cmp, label %unreached, label %normal
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normal:
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ret void
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unreached:
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call void @use(i32 %result)
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ret void
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}
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