forked from OSchip/llvm-project
80 lines
2.5 KiB
LLVM
80 lines
2.5 KiB
LLVM
|
; 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-LABEL: @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-LABEL: @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()
|
||
|
|
|
||
|
|
define i32 @test3(i32* nocapture readonly %P, i32 %i) {
|
||
|
|
entry:
|
||
|
|
%idxprom = sext i32 %i to i64
|
||
|
|
%arrayidx = getelementptr inbounds i32, i32* %P, i64 %idxprom
|
||
|
|
%0 = load i32, i32* %arrayidx, align 4
|
||
|
|
switch i32 %i, label %sw.epilog [
|
||
|
|
i32 5, label %sw.bb
|
||
|
|
i32 2, label %sw.bb
|
||
|
|
]
|
||
|
|
|
||
|
|
sw.bb: ; preds = %entry, %entry
|
||
|
|
; CHECK-LABEL: sw.bb:
|
||
|
|
; CHECK: %idxprom = sext i32 %i to i64
|
||
|
|
; CHECK: %arrayidx = getelementptr inbounds i32, i32* %P, i64 %idxprom
|
||
|
|
; CHECK: %0 = load i32, i32* %arrayidx, align 4
|
||
|
|
%add = add nsw i32 %0, %i
|
||
|
|
br label %sw.epilog
|
||
|
|
|
||
|
|
sw.epilog: ; preds = %entry, %sw.bb
|
||
|
|
%sum.0 = phi i32 [ %add, %sw.bb ], [ 0, %entry ]
|
||
|
|
ret i32 %sum.0
|
||
|
|
}
|