7b3702e2dd
Successfully tested both the gcc4 compiler on x86_64 with a simple program (fbdebug) and the gcc4-armhf cross-compiler to build a very old u-boot port for Galaxy Nexus (a MR will follow soon) which failed to boot with either newer version (6 and 8). [skip ci]: already went through
83 lines
2.4 KiB
Diff
83 lines
2.4 KiB
Diff
https://gcc.gnu.org/git/?p=gcc.git;a=patch;h=0817dc6f0e6b973e0e3671eb72d3758a8f042324
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(changelog changes removed)
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From 0817dc6f0e6b973e0e3671eb72d3758a8f042324 Mon Sep 17 00:00:00 2001
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From: hjl <hjl@138bc75d-0d04-0410-961f-82ee72b054a4>
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Date: Sun, 14 Dec 2014 16:07:03 +0000
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Subject: [PATCH] Pass unpromoted argument to promote_function_mode
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This patch updates setup_incoming_promotions in combine.c to match what
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is actually passed in assign_parm_setup_reg in function.c.
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Backported from mainline:
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gcc/
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PR rtl-optimization/64037
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* combine.c (setup_incoming_promotions): Pass the argument
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before any promotions happen to promote_function_mode.
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gcc/testsuite/
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PR rtl-optimization/64037
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* g++.dg/pr64037.C: New test.
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git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_9-branch@218721 138bc75d-0d04-0410-961f-82ee72b054a4
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---
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gcc/combine.c | 4 ++--
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gcc/testsuite/g++.dg/pr64037.C | 27 +++++++++++++++++++++++++++
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4 files changed, 46 insertions(+), 2 deletions(-)
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create mode 100644 gcc/testsuite/g++.dg/pr64037.C
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diff --git a/gcc/combine.c b/gcc/combine.c
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index 7c00452..adea2c1 100644
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--- a/gcc/combine.c
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+++ b/gcc/combine.c
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@@ -1529,8 +1529,8 @@ setup_incoming_promotions (rtx first)
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uns3 = TYPE_UNSIGNED (DECL_ARG_TYPE (arg));
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/* The mode and signedness of the argument as it is actually passed,
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- after any TARGET_PROMOTE_FUNCTION_ARGS-driven ABI promotions. */
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- mode3 = promote_function_mode (DECL_ARG_TYPE (arg), mode2, &uns3,
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+ see assign_parm_setup_reg in function.c. */
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+ mode3 = promote_function_mode (TREE_TYPE (arg), mode1, &uns3,
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TREE_TYPE (cfun->decl), 0);
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/* The mode of the register in which the argument is being passed. */
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diff --git a/gcc/testsuite/g++.dg/pr64037.C b/gcc/testsuite/g++.dg/pr64037.C
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new file mode 100644
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index 0000000..e5cd0e2
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--- /dev/null
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+++ b/gcc/testsuite/g++.dg/pr64037.C
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@@ -0,0 +1,27 @@
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+// { dg-do run { target i?86-*-* x86_64-*-* } }
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+// { dg-options "-std=c++11 -Os" }
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+
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+enum class X : unsigned char {
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+ V = 2,
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+};
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+
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+static void
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+__attribute__((noinline,noclone))
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+foo(unsigned &out, unsigned a, X b)
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+{
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+ out = static_cast<unsigned>(b);
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+}
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+
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+int main()
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+{
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+ unsigned deadbeef = 0xDEADBEEF;
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+ asm volatile ("" : "+d" (deadbeef), "+c" (deadbeef));
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+
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+ unsigned out;
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+ foo(out, 2, X::V);
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+
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+ if (out != 2)
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+ __builtin_abort ();
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+
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+ return 0;
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+}
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--
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1.7.1
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