-; RUN: opt < %s -instcombine -S | not grep icmp
+; RUN: opt < %s -instcombine -S | FileCheck %s
define i32 @test1(i32 %X) {
entry:
icmp slt i32 %X, 0 ; <i1>:0 [#uses=1]
zext i1 %0 to i32 ; <i32>:1 [#uses=1]
ret i32 %1
+; CHECK: @test1
+; CHECK: lshr i32 %X, 31
+; CHECK-NEXT: ret i32
}
define i32 @test2(i32 %X) {
icmp ult i32 %X, -2147483648 ; <i1>:0 [#uses=1]
zext i1 %0 to i32 ; <i32>:1 [#uses=1]
ret i32 %1
+; CHECK: @test2
+; CHECK: lshr i32 %X, 31
+; CHECK-NEXT: xor i32
+; CHECK-NEXT: ret i32
}
define i32 @test3(i32 %X) {
icmp slt i32 %X, 0 ; <i1>:0 [#uses=1]
sext i1 %0 to i32 ; <i32>:1 [#uses=1]
ret i32 %1
+; CHECK: @test3
+; CHECK: ashr i32 %X, 31
+; CHECK-NEXT: ret i32
}
define i32 @test4(i32 %X) {
icmp ult i32 %X, -2147483648 ; <i1>:0 [#uses=1]
sext i1 %0 to i32 ; <i32>:1 [#uses=1]
ret i32 %1
+; CHECK: @test4
+; CHECK: ashr i32 %X, 31
+; CHECK-NEXT: xor i32
+; CHECK-NEXT: ret i32
}
; PR4837
entry:
%V = icmp eq <2 x i64> %x, undef
ret <2 x i1> %V
+; CHECK: @test5
+; CHECK: ret <2 x i1> undef
}
define i32 @test6(i32 %a, i32 %b) {
%e = sub i32 0, %d
%f = and i32 %e, %b
ret i32 %f
+; CHECK: @test6
+; CHECK-NEXT: ashr i32 %a, 31
+; CHECK-NEXT: %f = and i32 %e, %b
+; CHECK-NEXT: ret i32 %f
}