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- ; RUN: opt -simplifycfg -S < %s | FileCheck %s
- ; This load is safe to speculate, as it's from a safe offset
- ; within an alloca.
- ; CHECK-LABEL: @yes(
- ; CHECK-NOT: br
- define void @yes(i1 %c) nounwind {
- entry:
- %a = alloca [4 x i64*], align 8
- %__a.addr = getelementptr [4 x i64*], [4 x i64*]* %a, i64 0, i64 3
- call void @frob(i64** %__a.addr)
- br i1 %c, label %if.then, label %if.end
- if.then: ; preds = %entry
- br label %return
- if.end: ; preds = %entry
- %tmp5 = load i64*, i64** %__a.addr, align 8
- br label %return
- return: ; preds = %if.end, %if.then
- %storemerge = phi i64* [ undef, %if.then ], [ %tmp5, %if.end ]
- ret void
- }
- ; CHECK-LABEL: @no0(
- ; CHECK: br i1 %c
- define void @no0(i1 %c) nounwind {
- entry:
- %a = alloca [4 x i64*], align 8
- %__a.addr = getelementptr [4 x i64*], [4 x i64*]* %a, i64 0, i64 4
- call void @frob(i64** %__a.addr)
- br i1 %c, label %if.then, label %if.end
- if.then: ; preds = %entry
- br label %return
- if.end: ; preds = %entry
- %tmp5 = load i64*, i64** %__a.addr, align 8
- br label %return
- return: ; preds = %if.end, %if.then
- %storemerge = phi i64* [ undef, %if.then ], [ %tmp5, %if.end ]
- ret void
- }
- ; CHECK-LABEL: @no1(
- ; CHECK: br i1 %c
- define void @no1(i1 %c, i64 %n) nounwind {
- entry:
- %a = alloca [4 x i64*], align 8
- %__a.addr = getelementptr [4 x i64*], [4 x i64*]* %a, i64 0, i64 %n
- call void @frob(i64** %__a.addr)
- br i1 %c, label %if.then, label %if.end
- if.then: ; preds = %entry
- br label %return
- if.end: ; preds = %entry
- %tmp5 = load i64*, i64** %__a.addr, align 8
- br label %return
- return: ; preds = %if.end, %if.then
- %storemerge = phi i64* [ undef, %if.then ], [ %tmp5, %if.end ]
- ret void
- }
- ; CHECK-LABEL: @no2(
- ; CHECK: br i1 %c
- define void @no2(i1 %c, i64 %n) nounwind {
- entry:
- %a = alloca [4 x i64*], align 8
- %__a.addr = getelementptr [4 x i64*], [4 x i64*]* %a, i64 1, i64 0
- call void @frob(i64** %__a.addr)
- br i1 %c, label %if.then, label %if.end
- if.then: ; preds = %entry
- br label %return
- if.end: ; preds = %entry
- %tmp5 = load i64*, i64** %__a.addr, align 8
- br label %return
- return: ; preds = %if.end, %if.then
- %storemerge = phi i64* [ undef, %if.then ], [ %tmp5, %if.end ]
- ret void
- }
- declare void @frob(i64** nocapture %p)
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