; RUN: opt -instcombine %s -S | FileCheck %s | |
;; This tests that the instructions in the entry blocks are sunk into each | |
;; arm of the 'if'. | |
define i32 @test1(i1 %C, i32 %A, i32 %B) { | |
; CHECK: @test1 | |
entry: | |
%tmp.2 = sdiv i32 %A, %B ; <i32> [#uses=1] | |
%tmp.9 = add i32 %B, %A ; <i32> [#uses=1] | |
br i1 %C, label %then, label %endif | |
then: ; preds = %entry | |
ret i32 %tmp.9 | |
endif: ; preds = %entry | |
; CHECK: sdiv i32 | |
; CHECK-NEXT: ret i32 | |
ret i32 %tmp.2 | |
} | |
;; PHI use, sink divide before call. | |
define i32 @test2(i32 %x) nounwind ssp { | |
; CHECK: @test2 | |
; CHECK-NOT: sdiv i32 | |
entry: | |
br label %bb | |
bb: ; preds = %bb2, %entry | |
%x_addr.17 = phi i32 [ %x, %entry ], [ %x_addr.0, %bb2 ] ; <i32> [#uses=4] | |
%i.06 = phi i32 [ 0, %entry ], [ %4, %bb2 ] ; <i32> [#uses=1] | |
%0 = add nsw i32 %x_addr.17, 1 ; <i32> [#uses=1] | |
%1 = sdiv i32 %0, %x_addr.17 ; <i32> [#uses=1] | |
%2 = icmp eq i32 %x_addr.17, 0 ; <i1> [#uses=1] | |
br i1 %2, label %bb1, label %bb2 | |
bb1: ; preds = %bb | |
; CHECK: bb1: | |
; CHECK-NEXT: add nsw i32 %x_addr.17, 1 | |
; CHECK-NEXT: sdiv i32 | |
; CHECK-NEXT: tail call i32 @bar() | |
%3 = tail call i32 @bar() nounwind ; <i32> [#uses=0] | |
br label %bb2 | |
bb2: ; preds = %bb, %bb1 | |
%x_addr.0 = phi i32 [ %1, %bb1 ], [ %x_addr.17, %bb ] ; <i32> [#uses=2] | |
%4 = add nsw i32 %i.06, 1 ; <i32> [#uses=2] | |
%exitcond = icmp eq i32 %4, 1000000 ; <i1> [#uses=1] | |
br i1 %exitcond, label %bb4, label %bb | |
bb4: ; preds = %bb2 | |
ret i32 %x_addr.0 | |
} | |
declare i32 @bar() |