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llvm-mirror/test/CodeGen/Mips/largeimmprinting.ll

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[mips] Stop reserving register AT and use register scavenger when a scratch register is needed. llvm-svn: 167341
2012-11-03 01:05:43 +01:00
; RUN: llc -march=mipsel < %s | FileCheck %s -check-prefix=32
; RUN: llc -march=mips64el -mcpu=mips64 -mattr=n64 < %s | \
; RUN: FileCheck %s -check-prefix=64
Revert r131152, r129796, r129761. This code is currently considered to be unreliable on platforms which require memcpy calls, and it is complicating broader legalize cleanups. It is hoped that these cleanups will make memcpy byval easier to implement in the future. llvm-svn: 138977
2011-09-02 01:07:08 +02:00
Test case for r132003. llvm-svn: 132005
2011-05-24 23:28:18 +02:00
%struct.S1 = type { [65536 x i8] }
@s1 = external global %struct.S1
define void @f() nounwind {
entry:
[mips] Stop reserving register AT and use register scavenger when a scratch register is needed. llvm-svn: 167341
2012-11-03 01:05:43 +01:00
; 32: lui $[[R0:[0-9]+]], 65535
; 32: addiu $[[R0]], $[[R0]], -24
; 32: addu $sp, $sp, $[[R0]]
; 32: lui $[[R1:[0-9]+]], 1
; 32: addu $[[R1]], $sp, $[[R1]]
; 32: sw $ra, 20($[[R1]])
; 64: daddiu $[[R0:[0-9]+]], $zero, 1
; 64: dsll $[[R0]], $[[R0]], 48
; 64: daddiu $[[R0]], $[[R0]], -1
; 64: dsll $[[R0]], $[[R0]], 16
[mips] Make sure loads from lazy-binding entries do not get CSE'd or hoisted out of loops. Previously, two consecutive calls to function "func" would result in the following sequence of instructions: 1. load $16, %got(func)($gp) // load address of lazy-binding stub. 2. move $25, $16 3. jalr $25 // jump to lazy-binding stub. 4. nop 5. move $25, $16 6. jalr $25 // jump to lazy-binding stub again. With this patch, the second call directly jumps to func's address, bypassing the lazy-binding resolution routine: 1. load $25, %got(func)($gp) // load address of lazy-binding stub. 2. jalr $25 // jump to lazy-binding stub. 3. nop 4. load $25, %got(func)($gp) // load resolved address of func. 5. jalr $25 // directly jump to func. llvm-svn: 191591
2013-09-28 02:12:32 +02:00
; 64: daddiu $[[R0]], $[[R0]], -32
[mips] Stop reserving register AT and use register scavenger when a scratch register is needed. llvm-svn: 167341
2012-11-03 01:05:43 +01:00
; 64: daddu $sp, $sp, $[[R0]]
; 64: lui $[[R1:[0-9]+]], 1
; 64: daddu $[[R1]], $sp, $[[R1]]
[mips] Make sure loads from lazy-binding entries do not get CSE'd or hoisted out of loops. Previously, two consecutive calls to function "func" would result in the following sequence of instructions: 1. load $16, %got(func)($gp) // load address of lazy-binding stub. 2. move $25, $16 3. jalr $25 // jump to lazy-binding stub. 4. nop 5. move $25, $16 6. jalr $25 // jump to lazy-binding stub again. With this patch, the second call directly jumps to func's address, bypassing the lazy-binding resolution routine: 1. load $25, %got(func)($gp) // load address of lazy-binding stub. 2. jalr $25 // jump to lazy-binding stub. 3. nop 4. load $25, %got(func)($gp) // load resolved address of func. 5. jalr $25 // directly jump to func. llvm-svn: 191591
2013-09-28 02:12:32 +02:00
; 64: sd $ra, 24($[[R1]])
Test case for r132003. llvm-svn: 132005
2011-05-24 23:28:18 +02:00
%agg.tmp = alloca %struct.S1, align 1
%tmp = getelementptr inbounds %struct.S1* %agg.tmp, i32 0, i32 0, i32 0
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %tmp, i8* getelementptr inbounds (%struct.S1* @s1, i32 0, i32 0, i32 0), i32 65536, i32 1, i1 false)
call void @f2(%struct.S1* byval %agg.tmp) nounwind
ret void
}
declare void @f2(%struct.S1* byval)
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind
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