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b339c55cd3
This patch changes the definition of negative from -0..-255 to -1..-255. I am changing this because of a bug that we had in some of the patterns that assumed that "subs" of zero does not set the carry flag. rdar://12028498 llvm-svn: 167963
32 lines
625 B
LLVM
32 lines
625 B
LLVM
; RUN: llc < %s -mtriple=thumbv7-apple-ios | FileCheck %s
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;CHECK: foo
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;CHECK: adds
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;CHECK-NEXT: adc
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;CHECK-NEXT: bx
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;rdar://12028498
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define i32 @foo() nounwind ssp {
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entry:
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%tmp2 = zext i32 3 to i64
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br label %bug_block
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bug_block:
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%tmp410 = and i64 1031, 1647010
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%tmp411 = and i64 %tmp2, -211
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%tmp412 = shl i64 %tmp410, %tmp2
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%tmp413 = shl i64 %tmp411, %tmp2
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%tmp415 = and i64 %tmp413, 1
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%tmp420 = xor i64 0, %tmp415
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%tmp421 = and i64 %tmp412, %tmp415
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%tmp422 = shl i64 %tmp421, 1
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br label %finish
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finish:
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%tmp423 = lshr i64 %tmp422, 32
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%tmp424 = trunc i64 %tmp423 to i32
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ret i32 %tmp424
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}
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