84 lines
1.9 KiB
LLVM
84 lines
1.9 KiB
LLVM
; RUN: opt < %s -simplifycfg -S | FileCheck %s
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define zeroext i1 @test1(i1 zeroext %flag, i32 %blksA, i32 %blksB, i32 %nblks) {
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entry:
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br i1 %flag, label %if.then, label %if.else
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; CHECK-LABEL: test1
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; CHECK: add
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; CHECK: select
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; CHECK: icmp
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; CHECK-NOT: br
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if.then:
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%cmp = icmp uge i32 %blksA, %nblks
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%frombool1 = zext i1 %cmp to i8
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br label %if.end
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if.else:
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%add = add i32 %nblks, %blksB
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%cmp2 = icmp ule i32 %add, %blksA
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%frombool3 = zext i1 %cmp2 to i8
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br label %if.end
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if.end:
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%obeys.0 = phi i8 [ %frombool1, %if.then ], [ %frombool3, %if.else ]
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%tobool4 = icmp ne i8 %obeys.0, 0
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ret i1 %tobool4
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}
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define zeroext i1 @test2(i1 zeroext %flag, i32 %blksA, i32 %blksB, i32 %nblks) {
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entry:
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br i1 %flag, label %if.then, label %if.else
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; CHECK-LABEL: test2
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; CHECK: add
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; CHECK: select
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; CHECK: icmp
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; CHECK-NOT: br
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if.then:
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%cmp = icmp uge i32 %blksA, %nblks
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%frombool1 = zext i1 %cmp to i8
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br label %if.end
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if.else:
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%add = add i32 %nblks, %blksB
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%cmp2 = icmp uge i32 %blksA, %add
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%frombool3 = zext i1 %cmp2 to i8
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br label %if.end
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if.end:
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%obeys.0 = phi i8 [ %frombool1, %if.then ], [ %frombool3, %if.else ]
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%tobool4 = icmp ne i8 %obeys.0, 0
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ret i1 %tobool4
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}
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declare i32 @foo(i32, i32) nounwind readnone
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define i32 @test3(i1 zeroext %flag, i32 %x, i32 %y) {
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entry:
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br i1 %flag, label %if.then, label %if.else
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if.then:
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%x0 = call i32 @foo(i32 %x, i32 0) nounwind readnone
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%y0 = call i32 @foo(i32 %x, i32 1) nounwind readnone
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br label %if.end
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if.else:
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%x1 = call i32 @foo(i32 %y, i32 0) nounwind readnone
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%y1 = call i32 @foo(i32 %y, i32 1) nounwind readnone
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br label %if.end
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if.end:
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%xx = phi i32 [ %x0, %if.then ], [ %x1, %if.else ]
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%yy = phi i32 [ %y0, %if.then ], [ %y1, %if.else ]
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%ret = add i32 %xx, %yy
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ret i32 %ret
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}
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; CHECK-LABEL: test3
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; CHECK: select
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; CHECK: call
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; CHECK: call
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; CHECK: add
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; CHECK-NOT: br
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