[llvm] f45d5e7 - [APFloat] Set size of PPCDoubleDouble to 128
Qiu Chaofan via llvm-commits
llvm-commits at lists.llvm.org
Fri Oct 8 19:13:53 PDT 2021
Author: Qiu Chaofan
Date: 2021-10-09T10:12:10+08:00
New Revision: f45d5e71d3e1ef9d565815850681719418a99d19
URL: https://github.com/llvm/llvm-project/commit/f45d5e71d3e1ef9d565815850681719418a99d19
DIFF: https://github.com/llvm/llvm-project/commit/f45d5e71d3e1ef9d565815850681719418a99d19.diff
LOG: [APFloat] Set size of PPCDoubleDouble to 128
566690b0 uses size information in float semantics, but PPCDoubleDouble
left them empty.
As follow-up, we can consider remove PPCDoubleDoubleLegacy and fill
other fields in the future.
Reviewed By: foad
Differential Revision: https://reviews.llvm.org/D111398
Added:
Modified:
llvm/lib/Support/APFloat.cpp
llvm/test/Transforms/InstCombine/bitcast-store.ll
Removed:
################################################################################
diff --git a/llvm/lib/Support/APFloat.cpp b/llvm/lib/Support/APFloat.cpp
index c456a5c86bada..4b75c9db85263 100644
--- a/llvm/lib/Support/APFloat.cpp
+++ b/llvm/lib/Support/APFloat.cpp
@@ -92,7 +92,7 @@ namespace llvm {
Note: we need to make the value
diff erent from semBogus as otherwise
an unsafe optimization may collapse both values to a single address,
and we heavily rely on them having distinct addresses. */
- static const fltSemantics semPPCDoubleDouble = {-1, 0, 0, 0};
+ static const fltSemantics semPPCDoubleDouble = {-1, 0, 0, 128};
/* These are legacy semantics for the fallback, inaccrurate implementation of
IBM double-double, if the accurate semPPCDoubleDouble doesn't handle the
diff --git a/llvm/test/Transforms/InstCombine/bitcast-store.ll b/llvm/test/Transforms/InstCombine/bitcast-store.ll
index bad4d9e19a353..27a6c177a2733 100644
--- a/llvm/test/Transforms/InstCombine/bitcast-store.ll
+++ b/llvm/test/Transforms/InstCombine/bitcast-store.ll
@@ -47,6 +47,16 @@ entry:
ret void
}
+; CHECK-LABEL: @ppcf128_ones_store
+; CHECK: store ppc_fp128 0xMFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF, ppc_fp128* %dest, align 16
+define void @ppcf128_ones_store(ppc_fp128* %dest) {
+entry:
+ %int = or i128 0, 340282366920938463463374607431768211455 ; 128 ones
+ %val = bitcast i128 %int to ppc_fp128
+ store ppc_fp128 %val, ppc_fp128* %dest, align 16
+ ret void
+}
+
!0 = !{!1}
!1 = !{!1, !2}
!2 = !{!2}
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