forked from OSchip/llvm-project
698 lines
15 KiB
LLVM
698 lines
15 KiB
LLVM
; RUN: opt < %s -gvn-sink -simplifycfg -simplifycfg-sink-common=false -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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; FIXME: The test failes when the original order of the
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; candidates with the same cost is preserved.
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;
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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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;
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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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;
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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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;
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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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;
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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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define i32 @test4(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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%a = add i32 %x, 5
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store i32 %a, i32* %y
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br label %if.end
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if.else:
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%b = add i32 %x, 7
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store i32 %b, i32* %y
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br label %if.end
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if.end:
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ret i32 1
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}
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; CHECK-LABEL: test4
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; CHECK: select
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; CHECK: store
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; CHECK-NOT: store
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define i32 @test5(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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%a = add i32 %x, 5
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store volatile i32 %a, i32* %y
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br label %if.end
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if.else:
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%b = add i32 %x, 7
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store i32 %b, i32* %y
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br label %if.end
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if.end:
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ret i32 1
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}
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; CHECK-LABEL: test5
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; CHECK: store volatile
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; CHECK: store
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define i32 @test6(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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%a = add i32 %x, 5
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store volatile i32 %a, i32* %y
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br label %if.end
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if.else:
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%b = add i32 %x, 7
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store volatile i32 %b, i32* %y
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br label %if.end
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if.end:
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ret i32 1
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}
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; CHECK-LABEL: test6
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; CHECK: select
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; CHECK: store volatile
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; CHECK-NOT: store
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define i32 @test7(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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%z = load volatile i32, i32* %y
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%a = add i32 %z, 5
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store volatile i32 %a, i32* %y
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br label %if.end
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if.else:
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%w = load volatile i32, i32* %y
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%b = add i32 %w, 7
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store volatile i32 %b, i32* %y
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br label %if.end
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if.end:
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ret i32 1
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}
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; CHECK-LABEL: test7
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; CHECK-DAG: select
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; CHECK-DAG: load volatile
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; CHECK: store volatile
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; CHECK-NOT: load
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; CHECK-NOT: store
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; The extra store in %if.then means %z and %w are not equivalent.
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define i32 @test9(i1 zeroext %flag, i32 %x, i32* %y, i32* %p) {
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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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store i32 7, i32* %p
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%z = load volatile i32, i32* %y
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store i32 6, i32* %p
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%a = add i32 %z, 5
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store volatile i32 %a, i32* %y
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br label %if.end
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if.else:
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%w = load volatile i32, i32* %y
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%b = add i32 %w, 7
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store volatile i32 %b, i32* %y
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br label %if.end
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if.end:
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ret i32 1
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}
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; CHECK-LABEL: test9
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; CHECK: add
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; CHECK: add
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%struct.anon = type { i32, i32 }
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; The GEP indexes a struct type so cannot have a variable last index.
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define i32 @test10(i1 zeroext %flag, i32 %x, i32* %y, %struct.anon* %s) {
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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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%dummy = add i32 %x, 5
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%gepa = getelementptr inbounds %struct.anon, %struct.anon* %s, i32 0, i32 0
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store volatile i32 %x, i32* %gepa
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br label %if.end
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if.else:
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%dummy1 = add i32 %x, 6
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%gepb = getelementptr inbounds %struct.anon, %struct.anon* %s, i32 0, i32 1
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store volatile i32 %x, i32* %gepb
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br label %if.end
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if.end:
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ret i32 1
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}
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; CHECK-LABEL: test10
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; CHECK: getelementptr
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; CHECK: store volatile
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; CHECK: getelementptr
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; CHECK: store volatile
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; The shufflevector's mask operand cannot be merged in a PHI.
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define i32 @test11(i1 zeroext %flag, i32 %w, <2 x i32> %x, <2 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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%dummy = add i32 %w, 5
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%sv1 = shufflevector <2 x i32> %x, <2 x i32> %y, <2 x i32> <i32 0, i32 1>
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br label %if.end
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if.else:
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%dummy1 = add i32 %w, 6
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%sv2 = shufflevector <2 x i32> %x, <2 x i32> %y, <2 x i32> <i32 1, i32 0>
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br label %if.end
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if.end:
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%p = phi <2 x i32> [ %sv1, %if.then ], [ %sv2, %if.else ]
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ret i32 1
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}
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; CHECK-LABEL: test11
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; CHECK: shufflevector
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; CHECK: shufflevector
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; We can't common an intrinsic!
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define i32 @test12(i1 zeroext %flag, i32 %w, 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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%dummy = add i32 %w, 5
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%sv1 = call i32 @llvm.ctlz.i32(i32 %x)
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br label %if.end
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if.else:
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%dummy1 = add i32 %w, 6
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%sv2 = call i32 @llvm.cttz.i32(i32 %x)
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br label %if.end
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if.end:
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%p = phi i32 [ %sv1, %if.then ], [ %sv2, %if.else ]
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ret i32 1
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}
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declare i32 @llvm.ctlz.i32(i32 %x) readnone
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declare i32 @llvm.cttz.i32(i32 %x) readnone
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; CHECK-LABEL: test12
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; CHECK: call i32 @llvm.ctlz
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; CHECK: call i32 @llvm.cttz
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; The TBAA metadata should be properly combined.
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define i32 @test13(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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%z = load volatile i32, i32* %y
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%a = add i32 %z, 5
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store volatile i32 %a, i32* %y, !tbaa !3
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br label %if.end
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if.else:
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%w = load volatile i32, i32* %y
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%b = add i32 %w, 7
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store volatile i32 %b, i32* %y, !tbaa !4
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br label %if.end
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if.end:
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ret i32 1
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}
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!0 = !{ !"an example type tree" }
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!1 = !{ !"int", !0 }
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!2 = !{ !"float", !0 }
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!3 = !{ !"const float", !2, i64 0 }
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!4 = !{ !"special float", !2, i64 1 }
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; CHECK-LABEL: test13
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; CHECK-DAG: select
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; CHECK-DAG: load volatile
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; CHECK: store volatile {{.*}}, !tbaa !0
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; CHECK-NOT: load
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; CHECK-NOT: store
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; The call should be commoned.
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define i32 @test13a(i1 zeroext %flag, i32 %w, 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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%sv1 = call i32 @bar(i32 %x)
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br label %if.end
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if.else:
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%sv2 = call i32 @bar(i32 %y)
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br label %if.end
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if.end:
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%p = phi i32 [ %sv1, %if.then ], [ %sv2, %if.else ]
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ret i32 1
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}
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declare i32 @bar(i32)
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; CHECK-LABEL: test13a
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; CHECK: %[[x:.*]] = select i1 %flag
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; CHECK: call i32 @bar(i32 %[[x]])
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; The load should be commoned.
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define i32 @test14(i1 zeroext %flag, i32 %w, i32 %x, i32 %y, %struct.anon* %s) {
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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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%dummy = add i32 %x, 1
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%gepa = getelementptr inbounds %struct.anon, %struct.anon* %s, i32 0, i32 1
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%sv1 = load i32, i32* %gepa
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%cmp1 = icmp eq i32 %sv1, 56
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br label %if.end
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if.else:
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%dummy2 = add i32 %x, 4
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%gepb = getelementptr inbounds %struct.anon, %struct.anon* %s, i32 0, i32 1
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%sv2 = load i32, i32* %gepb
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%cmp2 = icmp eq i32 %sv2, 57
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br label %if.end
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if.end:
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%p = phi i1 [ %cmp1, %if.then ], [ %cmp2, %if.else ]
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ret i32 1
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}
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; CHECK-LABEL: test14
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; CHECK: getelementptr
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; CHECK: load
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; CHECK-NOT: load
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; The load should be commoned.
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define i32 @test15(i1 zeroext %flag, i32 %w, i32 %x, i32 %y, %struct.anon* %s) {
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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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%dummy = add i32 %x, 1
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%gepa = getelementptr inbounds %struct.anon, %struct.anon* %s, i32 0, i32 0
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%sv1 = load i32, i32* %gepa
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%ext1 = zext i32 %sv1 to i64
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%cmp1 = icmp eq i64 %ext1, 56
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br label %if.end
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if.else:
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%dummy2 = add i32 %x, 4
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%gepb = getelementptr inbounds %struct.anon, %struct.anon* %s, i32 0, i32 1
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%sv2 = load i32, i32* %gepb
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%ext2 = zext i32 %sv2 to i64
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%cmp2 = icmp eq i64 %ext2, 56
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br label %if.end
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if.end:
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%p = phi i1 [ %cmp1, %if.then ], [ %cmp2, %if.else ]
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ret i32 1
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}
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; CHECK-LABEL: test15
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; CHECK: getelementptr
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; CHECK: load
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; CHECK-NOT: load
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define zeroext i1 @test_crash(i1 zeroext %flag, i32* %i4, i32* %m, i32* %n) {
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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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%tmp1 = load i32, i32* %i4
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%tmp2 = add i32 %tmp1, -1
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store i32 %tmp2, i32* %i4
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br label %if.end
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if.else:
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%tmp3 = load i32, i32* %m
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%tmp4 = load i32, i32* %n
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%tmp5 = add i32 %tmp3, %tmp4
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store i32 %tmp5, i32* %i4
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br label %if.end
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if.end:
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ret i1 true
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}
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; CHECK-LABEL: test_crash
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; No checks for test_crash - just ensure it doesn't crash!
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define zeroext i1 @test16(i1 zeroext %flag, i1 zeroext %flag2, 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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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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br i1 %flag2, label %if.then2, label %if.end
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if.then2:
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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.then2 ], [ 0, %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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; CHECK-LABEL: test16
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; CHECK: zext
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; CHECK: zext
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define zeroext i1 @test16a(i1 zeroext %flag, i1 zeroext %flag2, i32 %blksA, i32 %blksB, i32 %nblks, i8* %p) {
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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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%cmp = icmp uge i32 %blksA, %nblks
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%frombool1 = zext i1 %cmp to i8
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%b1 = sext i8 %frombool1 to i32
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%b2 = trunc i32 %b1 to i8
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store i8 %b2, i8* %p
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br label %if.end
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if.else:
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br i1 %flag2, label %if.then2, label %if.end
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if.then2:
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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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%a1 = sext i8 %frombool3 to i32
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%a2 = trunc i32 %a1 to i8
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store i8 %a2, i8* %p
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br label %if.end
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if.end:
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ret i1 true
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}
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; CHECK-LABEL: test16a
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; CHECK: zext
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; CHECK-NOT: zext
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define zeroext i1 @test17(i32 %flag, i32 %blksA, i32 %blksB, i32 %nblks) {
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entry:
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switch i32 %flag, label %if.end [
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i32 0, label %if.then
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i32 1, label %if.then2
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]
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if.then:
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%cmp = icmp uge i32 %blksA, %nblks
|
|
%frombool1 = call i8 @i1toi8(i1 %cmp)
|
|
%a1 = sext i8 %frombool1 to i32
|
|
%a2 = trunc i32 %a1 to i8
|
|
br label %if.end
|
|
|
|
if.then2:
|
|
%add = add i32 %nblks, %blksB
|
|
%cmp2 = icmp ule i32 %add, %blksA
|
|
%frombool3 = call i8 @i1toi8(i1 %cmp2)
|
|
%b1 = sext i8 %frombool3 to i32
|
|
%b2 = trunc i32 %b1 to i8
|
|
br label %if.end
|
|
|
|
if.end:
|
|
%obeys.0 = phi i8 [ %a2, %if.then ], [ %b2, %if.then2 ], [ 0, %entry ]
|
|
%tobool4 = icmp ne i8 %obeys.0, 0
|
|
ret i1 %tobool4
|
|
}
|
|
declare i8 @i1toi8(i1)
|
|
|
|
; FIXME: DISABLED - we don't consider this profitable. We should
|
|
; - Consider argument setup/return mov'ing for calls, like InlineCost does.
|
|
; - Consider the removal of the %obeys.0 PHI (zero PHI movement overall)
|
|
|
|
; DISABLED-CHECK-LABEL: test17
|
|
; DISABLED-CHECK: if.then:
|
|
; DISABLED-CHECK-NEXT: icmp uge
|
|
; DISABLED-CHECK-NEXT: br label %[[x:.*]]
|
|
|
|
; DISABLED-CHECK: if.then2:
|
|
; DISABLED-CHECK-NEXT: add
|
|
; DISABLED-CHECK-NEXT: icmp ule
|
|
; DISABLED-CHECK-NEXT: br label %[[x]]
|
|
|
|
; DISABLED-CHECK: [[x]]:
|
|
; DISABLED-CHECK-NEXT: %[[y:.*]] = phi i1 [ %cmp
|
|
; DISABLED-CHECK-NEXT: %[[z:.*]] = call i8 @i1toi8(i1 %[[y]])
|
|
; DISABLED-CHECK-NEXT: br label %if.end
|
|
|
|
; DISABLED-CHECK: if.end:
|
|
; DISABLED-CHECK-NEXT: phi i8
|
|
; DISABLED-CHECK-DAG: [ %[[z]], %[[x]] ]
|
|
; DISABLED-CHECK-DAG: [ 0, %entry ]
|
|
|
|
define zeroext i1 @test18(i32 %flag, i32 %blksA, i32 %blksB, i32 %nblks) {
|
|
entry:
|
|
switch i32 %flag, label %if.then3 [
|
|
i32 0, label %if.then
|
|
i32 1, label %if.then2
|
|
]
|
|
|
|
if.then:
|
|
%cmp = icmp uge i32 %blksA, %nblks
|
|
%frombool1 = zext i1 %cmp to i8
|
|
br label %if.end
|
|
|
|
if.then2:
|
|
%add = add i32 %nblks, %blksB
|
|
%cmp2 = icmp ule i32 %add, %blksA
|
|
%frombool3 = zext i1 %cmp2 to i8
|
|
br label %if.end
|
|
|
|
if.then3:
|
|
%add2 = add i32 %nblks, %blksA
|
|
%cmp3 = icmp ule i32 %add2, %blksA
|
|
%frombool4 = zext i1 %cmp3 to i8
|
|
br label %if.end
|
|
|
|
if.end:
|
|
%obeys.0 = phi i8 [ %frombool1, %if.then ], [ %frombool3, %if.then2 ], [ %frombool4, %if.then3 ]
|
|
%tobool4 = icmp ne i8 %obeys.0, 0
|
|
ret i1 %tobool4
|
|
}
|
|
|
|
; CHECK-LABEL: test18
|
|
; CHECK: if.end:
|
|
; CHECK-NEXT: %[[x:.*]] = phi i1
|
|
; CHECK-DAG: [ %cmp, %if.then ]
|
|
; CHECK-DAG: [ %cmp2, %if.then2 ]
|
|
; CHECK-DAG: [ %cmp3, %if.then3 ]
|
|
; CHECK-NEXT: zext i1 %[[x]] to i8
|
|
|
|
; The phi is confusing - both add instructions are used by it, but
|
|
; not on their respective unconditional arcs. It should not be
|
|
; optimized.
|
|
define void @test_pr30292(i1 %cond, i1 %cond2, i32 %a, i32 %b) {
|
|
entry:
|
|
%add1 = add i32 %a, 1
|
|
br label %succ
|
|
|
|
one:
|
|
br i1 %cond, label %two, label %succ
|
|
|
|
two:
|
|
call void @g()
|
|
%add2 = add i32 %a, 1
|
|
br label %succ
|
|
|
|
succ:
|
|
%p = phi i32 [ 0, %entry ], [ %add1, %one ], [ %add2, %two ]
|
|
br label %one
|
|
}
|
|
declare void @g()
|
|
|
|
; CHECK-LABEL: test_pr30292
|
|
; CHECK: phi i32 [ 0, %entry ], [ %add1, %succ ], [ %add2, %two ]
|
|
|
|
define zeroext i1 @test_pr30244(i1 zeroext %flag, i1 zeroext %flag2, i32 %blksA, i32 %blksB, i32 %nblks) {
|
|
|
|
entry:
|
|
%p = alloca i8
|
|
br i1 %flag, label %if.then, label %if.else
|
|
|
|
if.then:
|
|
%cmp = icmp uge i32 %blksA, %nblks
|
|
%frombool1 = zext i1 %cmp to i8
|
|
store i8 %frombool1, i8* %p
|
|
br label %if.end
|
|
|
|
if.else:
|
|
br i1 %flag2, label %if.then2, label %if.end
|
|
|
|
if.then2:
|
|
%add = add i32 %nblks, %blksB
|
|
%cmp2 = icmp ule i32 %add, %blksA
|
|
%frombool3 = zext i1 %cmp2 to i8
|
|
store i8 %frombool3, i8* %p
|
|
br label %if.end
|
|
|
|
if.end:
|
|
ret i1 true
|
|
}
|
|
|
|
; CHECK-LABEL: @test_pr30244
|
|
; CHECK: store
|
|
; CHECK-NOT: store
|
|
|
|
define i32 @test_pr30373a(i1 zeroext %flag, i32 %x, i32 %y) {
|
|
entry:
|
|
br i1 %flag, label %if.then, label %if.else
|
|
|
|
if.then:
|
|
%x0 = call i32 @foo(i32 %x, i32 0) nounwind readnone
|
|
%y0 = call i32 @foo(i32 %x, i32 1) nounwind readnone
|
|
%z0 = lshr i32 %y0, 8
|
|
br label %if.end
|
|
|
|
if.else:
|
|
%x1 = call i32 @foo(i32 %y, i32 0) nounwind readnone
|
|
%y1 = call i32 @foo(i32 %y, i32 1) nounwind readnone
|
|
%z1 = lshr exact i32 %y1, 8
|
|
br label %if.end
|
|
|
|
if.end:
|
|
%xx = phi i32 [ %x0, %if.then ], [ %x1, %if.else ]
|
|
%yy = phi i32 [ %z0, %if.then ], [ %z1, %if.else ]
|
|
%ret = add i32 %xx, %yy
|
|
ret i32 %ret
|
|
}
|
|
|
|
; CHECK-LABEL: test_pr30373a
|
|
; CHECK: lshr
|
|
; CHECK-NOT: exact
|
|
; CHECK: }
|
|
|
|
define i32 @test_pr30373b(i1 zeroext %flag, i32 %x, i32 %y) {
|
|
entry:
|
|
br i1 %flag, label %if.then, label %if.else
|
|
|
|
if.then:
|
|
%x0 = call i32 @foo(i32 %x, i32 0) nounwind readnone
|
|
%y0 = call i32 @foo(i32 %x, i32 1) nounwind readnone
|
|
%z0 = lshr exact i32 %y0, 8
|
|
br label %if.end
|
|
|
|
if.else:
|
|
%x1 = call i32 @foo(i32 %y, i32 0) nounwind readnone
|
|
%y1 = call i32 @foo(i32 %y, i32 1) nounwind readnone
|
|
%z1 = lshr i32 %y1, 8
|
|
br label %if.end
|
|
|
|
if.end:
|
|
%xx = phi i32 [ %x0, %if.then ], [ %x1, %if.else ]
|
|
%yy = phi i32 [ %z0, %if.then ], [ %z1, %if.else ]
|
|
%ret = add i32 %xx, %yy
|
|
ret i32 %ret
|
|
}
|
|
|
|
; CHECK-LABEL: test_pr30373b
|
|
; CHECK: lshr
|
|
; CHECK-NOT: exact
|
|
; CHECK: }
|
|
|
|
; CHECK: !0 = !{!1, !1, i64 0}
|
|
; CHECK: !1 = !{!"float", !2}
|
|
; CHECK: !2 = !{!"an example type tree"}
|