57 lines
1.1 KiB
LLVM
57 lines
1.1 KiB
LLVM
; RUN: opt -codegenprepare -S < %s | FileCheck %s
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target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
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target triple = "thumbv8m.main-arm-none-eabi"
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; CHECK-LABEL: uadd_overflow_too_far_cmp_dom
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; CHECK-NOT: with.overflow.i32
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define i32 @uadd_overflow_too_far_cmp_dom(i32 %arg0) {
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entry:
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%cmp = icmp ne i32 %arg0, 0
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br i1 %cmp, label %if.else, label %if.then
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if.then:
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call void @foo()
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br label %exit
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if.else:
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call void @bar()
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br label %if.end
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if.end:
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%dec = add nsw i32 %arg0, -1
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br label %exit
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exit:
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%res = phi i32 [ %arg0, %if.then ], [ %dec, %if.end ]
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ret i32 %res
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}
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; CHECK-LABEL: uadd_overflow_too_far_math_dom
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; CHECK-NOT: with.overflow.i32
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define i32 @uadd_overflow_too_far_math_dom(i32 %arg0, i32 %arg1) {
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entry:
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%dec = add nsw i32 %arg0, -1
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%cmp = icmp ugt i32 %arg0, 1
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br i1 %cmp, label %if.else, label %if.then
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if.then:
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call void @foo()
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br label %if.end
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if.else:
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call void @bar()
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br label %if.end
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if.end:
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%cmp.i.i = icmp ne i32 %arg0, 0
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%tobool = zext i1 %cmp.i.i to i32
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br label %exit
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exit:
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ret i32 %tobool
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}
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declare void @foo()
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declare void @bar()
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