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- ; 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()
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