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94 lines
2.5 KiB
LLVM
94 lines
2.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instcombine -S | FileCheck %s
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; PR30281 - https://llvm.org/bugs/show_bug.cgi?id=30281
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; All of these tests contain foldable division-by-constant instructions, but we
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; can't assert that those folds have occurred before we process the later icmp.
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define i32 @icmp_div(i16 %a, i16 %c) {
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; CHECK-LABEL: @icmp_div(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i16 %a, 0
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; CHECK-NEXT: br i1 [[TOBOOL]], label %then, label %exit
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; CHECK: then:
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; CHECK-NEXT: [[NOT_CMP:%.*]] = icmp eq i16 %c, 0
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; CHECK-NEXT: [[PHITMP1:%.*]] = sext i1 [[NOT_CMP]] to i32
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; CHECK-NEXT: br label %exit
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; CHECK: exit:
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; CHECK-NEXT: [[PHI:%.*]] = phi i32 [ -1, %entry ], [ [[PHITMP1]], %then ]
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; CHECK-NEXT: ret i32 [[PHI]]
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;
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entry:
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%tobool = icmp eq i16 %a, 0
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br i1 %tobool, label %then, label %exit
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then:
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%div = sdiv i16 %c, -1
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%cmp = icmp ne i16 %div, 0
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br label %exit
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exit:
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%phi = phi i1 [ false, %entry ], [ %cmp, %then ]
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%zext = zext i1 %phi to i32
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%add = add nsw i32 %zext, -1
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ret i32 %add
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}
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define i32 @icmp_div2(i16 %a, i16 %c) {
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; CHECK-LABEL: @icmp_div2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i16 %a, 0
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; CHECK-NEXT: br i1 [[TOBOOL]], label %then, label %exit
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; CHECK: then:
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; CHECK-NEXT: br label %exit
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; CHECK: exit:
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; CHECK-NEXT: [[PHI:%.*]] = phi i32 [ -1, %entry ], [ 0, %then ]
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; CHECK-NEXT: ret i32 [[PHI]]
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;
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entry:
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%tobool = icmp eq i16 %a, 0
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br i1 %tobool, label %then, label %exit
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then:
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%div = sdiv i16 %c, 0
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%cmp = icmp ne i16 %div, 0
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br label %exit
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exit:
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%phi = phi i1 [ false, %entry ], [ %cmp, %then ]
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%zext = zext i1 %phi to i32
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%add = add nsw i32 %zext, -1
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ret i32 %add
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}
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define i32 @icmp_div3(i16 %a, i16 %c) {
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; CHECK-LABEL: @icmp_div3(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i16 %a, 0
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; CHECK-NEXT: br i1 [[TOBOOL]], label %then, label %exit
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; CHECK: then:
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; CHECK-NEXT: [[NOT_CMP:%.*]] = icmp eq i16 %c, 0
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; CHECK-NEXT: [[PHITMP1:%.*]] = sext i1 [[NOT_CMP]] to i32
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; CHECK-NEXT: br label %exit
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; CHECK: exit:
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; CHECK-NEXT: [[PHI:%.*]] = phi i32 [ -1, %entry ], [ [[PHITMP1]], %then ]
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; CHECK-NEXT: ret i32 [[PHI]]
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;
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entry:
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%tobool = icmp eq i16 %a, 0
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br i1 %tobool, label %then, label %exit
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then:
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%div = sdiv i16 %c, 1
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%cmp = icmp ne i16 %div, 0
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br label %exit
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exit:
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%phi = phi i1 [ false, %entry ], [ %cmp, %then ]
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%zext = zext i1 %phi to i32
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%add = add nsw i32 %zext, -1
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ret i32 %add
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}
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