derek.holloway
7502bf64a4
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70 lines
1.9 KiB
LLVM
70 lines
1.9 KiB
LLVM
; RUN: opt -S -passes='function(gvn-hoist),function(newgvn)' < %s | FileCheck %s
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; Check that store hoisting works: there should be only one store left.
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; CHECK-LABEL: @getopt
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; CHECK: store i32
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; CHECK-NOT: store i32
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@optind = external global i32, align 4
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define void @getopt(i1 %arg) {
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bb:
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br label %bb1
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bb1: ; preds = %bb
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br i1 %arg, label %bb2, label %bb3
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bb2: ; preds = %bb1
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br label %bb13
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bb3: ; preds = %bb1
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br i1 %arg, label %bb4, label %bb9
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bb4: ; preds = %bb3
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%tmp = load i32, ptr @optind, align 4
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br i1 %arg, label %bb5, label %bb7
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bb5: ; preds = %bb4
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%tmp6 = add nsw i32 %tmp, 1
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store i32 %tmp6, ptr @optind, align 4
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br label %bb12
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bb7: ; preds = %bb4
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%tmp8 = add nsw i32 %tmp, 1
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store i32 %tmp8, ptr @optind, align 4
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br label %bb13
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bb9: ; preds = %bb3
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%tmp10 = load i32, ptr @optind, align 4
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%tmp11 = add nsw i32 %tmp10, 1
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store i32 %tmp11, ptr @optind, align 4
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br label %bb12
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bb12: ; preds = %bb9, %bb5
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br label %bb13
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bb13: ; preds = %bb12, %bb7, %bb2
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ret void
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}
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@GlobalVar = internal global float 1.000000e+00
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; Check that we hoist stores and remove the MSSA phi node.
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; CHECK-LABEL: @hoistStoresUpdateMSSA
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; CHECK: store float
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; CHECK-NOT: store float
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define float @hoistStoresUpdateMSSA(float %d) {
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entry:
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store float 0.000000e+00, ptr @GlobalVar
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%cmp = fcmp oge float %d, 0.000000e+00
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br i1 %cmp, label %if.then, label %if.end
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if.then:
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store float 0.000000e+00, ptr @GlobalVar
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br label %if.end
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if.end:
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%tmp = load float, ptr @GlobalVar, align 4
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ret float %tmp
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}
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