; This file contains various testcases that check to see that instcombine
; is narrowing computations when possible.
-
-; RUN: llvm-upgrade < %s | llvm-as | opt -instcombine | llvm-dis | \
-; RUN: grep 'ret i1 false'
+; RUN: opt < %s -instcombine -S | \
+; RUN: grep "ret i1 false"
; test1 - Eliminating the casts in this testcase (by narrowing the AND
; operation) allows instcombine to realize the function always returns false.
;
-bool %test1(int %A, int %B) {
- %C1 = setlt int %A, %B
- %ELIM1 = zext bool %C1 to uint
- %C2 = setgt int %A, %B
- %ELIM2 = zext bool %C2 to uint
- %C3 = and uint %ELIM1, %ELIM2
- %ELIM3 = trunc uint %C3 to bool
- ret bool %ELIM3
+define i1 @test1(i32 %A, i32 %B) {
+ %C1 = icmp slt i32 %A, %B ; <i1> [#uses=1]
+ %ELIM1 = zext i1 %C1 to i32 ; <i32> [#uses=1]
+ %C2 = icmp sgt i32 %A, %B ; <i1> [#uses=1]
+ %ELIM2 = zext i1 %C2 to i32 ; <i32> [#uses=1]
+ %C3 = and i32 %ELIM1, %ELIM2 ; <i32> [#uses=1]
+ %ELIM3 = trunc i32 %C3 to i1 ; <i1> [#uses=1]
+ ret i1 %ELIM3
}
+