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[mips] Promote i32 arguments to i64 for the N32/N64 ABI and fix <64-bit structs...

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Summary:
... and after all that refactoring, it's possible to distinguish softfloat
floating point values from integers so this patch no longer breaks softfloat to
do it.

Remove direct handling of i32's in the N32/N64 ABI by promoting them to
i64. This more closely reflects the ABI documentation and also fixes
problems with stack arguments on big-endian targets.

We now rely on signext/zeroext annotations (already generated by clang) and
the Assert[SZ]ext nodes to avoid the introduction of unnecessary sign/zero
extends.

It was not possible to convert three tests to use signext/zeroext. These tests
are bswap.ll, ctlz-v.ll, ctlz-v.ll. It's not possible to put signext on a
vector type so we just accept the sign extends here for now. These tests don't
pass the vectors the same way clang does (clang puts multiple elements in the
same argument, these map 1 element to 1 argument) so we don't need to worry too
much about it.

With this patch, all known N32/N64 bugs should be fixed and we now pass the
first 10,000 tests generated by ABITest.py.

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D6117


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221534 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Sanders
2014-11-07 16:54:21 +00:00
parent 93f761eced
commit fe2b8b1960
24 changed files with 259 additions and 179 deletions
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34
test/CodeGen/Mips/cmov.ll
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@@ -38,7 +38,7 @@
; 64-CMP-DAG: or $[[T2:[0-9]+]], $[[T0]], $[[T1]]
; 64-CMP-DAG: ld $2, 0($[[T2]])
define i32* @cmov1(i32 %s) nounwind readonly {
define i32* @cmov1(i32 signext %s) nounwind readonly {
entry:
%tobool = icmp ne i32 %s, 0
%tmp1 = load i32** @i3, align 4
@@ -78,7 +78,7 @@ entry:
; 64-CMP-DAG: or $[[T2:[0-9]+]], $[[T0]], $[[T1]]
; 64-CMP-DAG: lw $2, 0($[[T2]])
define i32 @cmov2(i32 %s) nounwind readonly {
define i32 @cmov2(i32 signext %s) nounwind readonly {
entry:
%tobool = icmp ne i32 %s, 0
%tmp1 = load i32* @c, align 4
@@ -109,7 +109,7 @@ entry:
; 64-CMP-DAG: selnez $[[T1:[0-9]+]], $6, $[[CC]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i32 @cmov3(i32 %a, i32 %b, i32 %c) nounwind readnone {
define i32 @cmov3(i32 signext %a, i32 signext %b, i32 signext %c) nounwind readnone {
entry:
%cmp = icmp eq i32 %a, 234
%cond = select i1 %cmp, i32 %b, i32 %c
@@ -142,7 +142,7 @@ entry:
; 64-CMP-DAG: seleqz $[[T1:[0-9]+]], $6, $[[CC]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i32 @cmov3_ne(i32 %a, i32 %b, i32 %c) nounwind readnone {
define i32 @cmov3_ne(i32 signext %a, i32 signext %b, i32 signext %c) nounwind readnone {
entry:
%cmp = icmp ne i32 %a, 234
%cond = select i1 %cmp, i32 %b, i32 %c
@@ -179,7 +179,7 @@ entry:
; 64-CMP-DAG: selnez $[[T1:[0-9]+]], $6, $[[R0]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i64 @cmov4(i32 %a, i64 %b, i64 %c) nounwind readnone {
define i64 @cmov4(i32 signext %a, i64 %b, i64 %c) nounwind readnone {
entry:
%cmp = icmp eq i32 %a, 234
%cond = select i1 %cmp, i64 %b, i64 %c
@@ -220,7 +220,7 @@ entry:
; 64-CMP-DAG: seleqz $[[T1:[0-9]+]], $6, $[[R0]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i64 @cmov4_ne(i32 %a, i64 %b, i64 %c) nounwind readnone {
define i64 @cmov4_ne(i32 signext %a, i64 %b, i64 %c) nounwind readnone {
entry:
%cmp = icmp ne i32 %a, 234
%cond = select i1 %cmp, i64 %b, i64 %c
@@ -263,7 +263,7 @@ entry:
; 64-CMP-DAG: selnez $[[T1:[0-9]+]], $[[I5]], $[[R0]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i32 @slti0(i32 %a) {
define i32 @slti0(i32 signext %a) {
entry:
%cmp = icmp sgt i32 %a, 32766
%cond = select i1 %cmp, i32 3, i32 5
@@ -302,7 +302,7 @@ entry:
; 64-CMP-DAG: seleqz $[[T1:[0-9]+]], $[[I5]], $[[R0]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i32 @slti1(i32 %a) {
define i32 @slti1(i32 signext %a) {
entry:
%cmp = icmp sgt i32 %a, 32767
%cond = select i1 %cmp, i32 7, i32 5
@@ -337,7 +337,7 @@ entry:
; 64-CMP-DAG: selnez $[[T1:[0-9]+]], $[[I5]], $[[R0]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i32 @slti2(i32 %a) {
define i32 @slti2(i32 signext %a) {
entry:
%cmp = icmp sgt i32 %a, -32769
%cond = select i1 %cmp, i32 3, i32 5
@@ -380,7 +380,7 @@ entry:
; 64-CMP-DAG: seleqz $[[T1:[0-9]+]], $[[I5]], $[[R0]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i32 @slti3(i32 %a) {
define i32 @slti3(i32 signext %a) {
entry:
%cmp = icmp sgt i32 %a, -32770
%cond = select i1 %cmp, i32 3, i32 5
@@ -567,7 +567,7 @@ entry:
; 64-CMP-DAG: selnez $[[T1:[0-9]+]], $[[I5]], $[[R0]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i32 @sltiu0(i32 %a) {
define i32 @sltiu0(i32 signext %a) {
entry:
%cmp = icmp ugt i32 %a, 32766
%cond = select i1 %cmp, i32 3, i32 5
@@ -606,7 +606,7 @@ entry:
; 64-CMP-DAG: seleqz $[[T1:[0-9]+]], $[[I5]], $[[R0]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i32 @sltiu1(i32 %a) {
define i32 @sltiu1(i32 signext %a) {
entry:
%cmp = icmp ugt i32 %a, 32767
%cond = select i1 %cmp, i32 7, i32 5
@@ -641,7 +641,7 @@ entry:
; 64-CMP-DAG: selnez $[[T1:[0-9]+]], $[[I5]], $[[R0]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i32 @sltiu2(i32 %a) {
define i32 @sltiu2(i32 signext %a) {
entry:
%cmp = icmp ugt i32 %a, -32769
%cond = select i1 %cmp, i32 3, i32 5
@@ -684,7 +684,7 @@ entry:
; 64-CMP-DAG: seleqz $[[T1:[0-9]+]], $[[I5]], $[[R0]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i32 @sltiu3(i32 %a) {
define i32 @sltiu3(i32 signext %a) {
entry:
%cmp = icmp ugt i32 %a, -32770
%cond = select i1 %cmp, i32 3, i32 5
@@ -697,7 +697,7 @@ entry:
; doesn't generate conditional moves
; for constant operands whose difference is |1|
define i32 @slti4(i32 %a) nounwind readnone {
define i32 @slti4(i32 signext %a) nounwind readnone {
%1 = icmp slt i32 %a, 7
%2 = select i1 %1, i32 4, i32 3
ret i32 %2
@@ -723,7 +723,7 @@ define i32 @slti4(i32 %a) nounwind readnone {
; 64-CMP-NOT: seleqz
; 64-CMP-NOT: selnez
define i32 @slti5(i32 %a) nounwind readnone {
define i32 @slti5(i32 signext %a) nounwind readnone {
%1 = icmp slt i32 %a, 7
%2 = select i1 %1, i32 -3, i32 -4
ret i32 %2
@@ -749,7 +749,7 @@ define i32 @slti5(i32 %a) nounwind readnone {
; 64-CMP-NOT: seleqz
; 64-CMP-NOT: selnez
define i32 @slti6(i32 %a) nounwind readnone {
define i32 @slti6(i32 signext %a) nounwind readnone {
%1 = icmp slt i32 %a, 7
%2 = select i1 %1, i32 3, i32 4
ret i32 %2