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llvm-mirror/test/CodeGen/PowerPC/negate-i1.ll

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[DAG] optimize negation of bool Use mask and negate for legalization of i1 source type with SIGN_EXTEND_INREG. With the mask, this should be no worse than 2 shifts. The mask can be eliminated in some cases, so that should be better than 2 shifts. This change exposed some missing folds related to negation: https://reviews.llvm.org/rL284239 https://reviews.llvm.org/rL284395 There may be others, so please let me know if you see any regressions. Differential Revision: https://reviews.llvm.org/D25485 llvm-svn: 284611
2016-10-19 18:58:59 +02:00
; RUN: llc -verify-machineinstrs < %s -mtriple=powerpc64le-unknown-linux-gnu | FileCheck %s
[PowerPC] add tests for PR30661 llvm-svn: 284279
2016-10-14 22:51:41 +02:00
; PR30661 - https://llvm.org/bugs/show_bug.cgi?id=30661
define i32 @select_i32_neg1_or_0(i1 %a) {
; CHECK-LABEL: select_i32_neg1_or_0:
[DAG] optimize negation of bool Use mask and negate for legalization of i1 source type with SIGN_EXTEND_INREG. With the mask, this should be no worse than 2 shifts. The mask can be eliminated in some cases, so that should be better than 2 shifts. This change exposed some missing folds related to negation: https://reviews.llvm.org/rL284239 https://reviews.llvm.org/rL284395 There may be others, so please let me know if you see any regressions. Differential Revision: https://reviews.llvm.org/D25485 llvm-svn: 284611
2016-10-19 18:58:59 +02:00
; CHECK: # BB#0:
; CHECK-NEXT: clrldi 3, 3, 63
; CHECK-NEXT: neg 3, 3
[PowerPC] add tests for PR30661 llvm-svn: 284279
2016-10-14 22:51:41 +02:00
; CHECK-NEXT: blr
;
%b = sext i1 %a to i32
ret i32 %b
}
define i32 @select_i32_neg1_or_0_zeroext(i1 zeroext %a) {
; CHECK-LABEL: select_i32_neg1_or_0_zeroext:
[DAG] optimize negation of bool Use mask and negate for legalization of i1 source type with SIGN_EXTEND_INREG. With the mask, this should be no worse than 2 shifts. The mask can be eliminated in some cases, so that should be better than 2 shifts. This change exposed some missing folds related to negation: https://reviews.llvm.org/rL284239 https://reviews.llvm.org/rL284395 There may be others, so please let me know if you see any regressions. Differential Revision: https://reviews.llvm.org/D25485 llvm-svn: 284611
2016-10-19 18:58:59 +02:00
; CHECK: # BB#0:
; CHECK-NEXT: neg 3, 3
[PowerPC] add tests for PR30661 llvm-svn: 284279
2016-10-14 22:51:41 +02:00
; CHECK-NEXT: blr
;
%b = sext i1 %a to i32
ret i32 %b
}
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