2014-06-12 02:28:45 +08:00
|
|
|
; RUN: opt < %s -reassociate -instcombine -S | FileCheck %s
|
2005-05-09 05:28:33 +08:00
|
|
|
|
|
|
|
; Test that we can turn things like X*-(Y*Z) -> X*-1*Y*Z.
|
|
|
|
|
2008-03-19 12:36:04 +08:00
|
|
|
define i32 @test1(i32 %a, i32 %b, i32 %z) {
|
2014-06-12 02:28:45 +08:00
|
|
|
; CHECK-LABEL: test1
|
|
|
|
; CHECK-NEXT: %e = mul i32 %a, 12345
|
|
|
|
; CHECK-NEXT: %f = mul i32 %e, %b
|
|
|
|
; CHECK-NEXT: %g = mul i32 %f, %z
|
|
|
|
; CHECK-NEXT: ret i32 %g
|
|
|
|
|
|
|
|
%c = sub i32 0, %z
|
|
|
|
%d = mul i32 %a, %b
|
|
|
|
%e = mul i32 %c, %d
|
|
|
|
%f = mul i32 %e, 12345
|
|
|
|
%g = sub i32 0, %f
|
|
|
|
ret i32 %g
|
2005-05-09 05:28:33 +08:00
|
|
|
}
|
|
|
|
|
2008-03-19 12:36:04 +08:00
|
|
|
define i32 @test2(i32 %a, i32 %b, i32 %z) {
|
2014-06-12 02:28:45 +08:00
|
|
|
; CHECK-LABEL: test2
|
|
|
|
; CHECK-NEXT: %e = mul i32 %a, 40
|
|
|
|
; CHECK-NEXT: %f = mul i32 %e, %z
|
|
|
|
; CHECK-NEXT: ret i32 %f
|
2008-03-19 12:36:04 +08:00
|
|
|
|
2014-06-12 02:28:45 +08:00
|
|
|
%d = mul i32 %z, 40
|
|
|
|
%c = sub i32 0, %d
|
|
|
|
%e = mul i32 %a, %c
|
|
|
|
%f = sub i32 0, %e
|
|
|
|
ret i32 %f
|
|
|
|
}
|