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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64093 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1831,3 +1831,34 @@ unsigned long f2(struct s2 x) {
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//===---------------------------------------------------------------------===//
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We currently compile this:
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define i32 @func1(i32 %v1, i32 %v2) nounwind {
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entry:
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%t = call {i32, i1} @llvm.sadd.with.overflow.i32(i32 %v1, i32 %v2)
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%sum = extractvalue {i32, i1} %t, 0
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%obit = extractvalue {i32, i1} %t, 1
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br i1 %obit, label %overflow, label %normal
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normal:
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ret i32 %sum
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overflow:
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call void @llvm.trap()
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unreachable
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}
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declare {i32, i1} @llvm.sadd.with.overflow.i32(i32, i32)
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declare void @llvm.trap()
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to:
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_func1:
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movl 4(%esp), %eax
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addl 8(%esp), %eax
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jo LBB1_2 ## overflow
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LBB1_1: ## normal
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ret
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LBB1_2: ## overflow
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ud2
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it would be nice to produce "into" someday.
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//===---------------------------------------------------------------------===//
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