From dfb47981f16ee79071a976f5f4cd7ac50d4073ef Mon Sep 17 00:00:00 2001 From: rearnsha Date: Sun, 16 Feb 2003 19:40:11 +0000 Subject: [PATCH] * arm.c (arm_reload_in_hi): Ensure that the scratch register does not overlap the final result register. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@62981 138bc75d-0d04-0410-961f-82ee72b054a4 --- gcc/ChangeLog | 5 +++++ gcc/config/arm/arm.c | 9 ++++++++- 2 files changed, 13 insertions(+), 1 deletion(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index a1504201565..79562ba52ac 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2003-02-16 Richard Earnshaw + + * arm.c (arm_reload_in_hi): Ensure that the scratch register does + not overlap the final result register. + 2003-02-16 Arend Bayer Richard Henderson diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c index 2d4f4d89123..0847c97ae9d 100644 --- a/gcc/config/arm/arm.c +++ b/gcc/config/arm/arm.c @@ -5845,7 +5845,14 @@ arm_reload_in_hi (operands) } } - scratch = gen_rtx_REG (SImode, REGNO (operands[2])); + /* Operands[2] may overlap operands[0] (though it won't overlap + operands[1]), that's why we asked for a DImode reg -- so we can + use the bit that does not overlap. */ + if (REGNO (operands[2]) == REGNO (operands[0])) + scratch = gen_rtx_REG (SImode, REGNO (operands[2]) + 1); + else + scratch = gen_rtx_REG (SImode, REGNO (operands[2])); + emit_insn (gen_zero_extendqisi2 (scratch, gen_rtx_MEM (QImode, plus_constant (base, -- 2.11.4.GIT