llvm-mirror/test/Transforms/InstCombine/signed-comparison.ll

; RUN: opt < %s -instcombine -S > %t
; RUN: not grep zext %t
; RUN: not grep slt %t
; RUN: grep "icmp ult" %t

; Instcombine should convert the zext+slt into a simple ult.

define void @foo(double* %p) nounwind {
entry:
	br label %bb

bb:
	%indvar = phi i64 [ 0, %entry ], [ %indvar.next, %bb ]
	%t0 = and i64 %indvar, 65535
	%t1 = getelementptr double* %p, i64 %t0
	%t2 = load double* %t1, align 8
	%t3 = fmul double %t2, 2.2
	store double %t3, double* %t1, align 8
	%i.04 = trunc i64 %indvar to i16
	%t4 = add i16 %i.04, 1
	%t5 = zext i16 %t4 to i32
	%t6 = icmp slt i32 %t5, 500
	%indvar.next = add i64 %indvar, 1
	br i1 %t6, label %bb, label %return

return:
	ret void
}
Change tests from "opt %s" to "opt < %s" so that opt doesn't see the input filename so that opt doesn't print the input filename in the output so that grep lines in the tests don't unintentionally match strings in the input filename. llvm-svn: 81537 2009-09-11 20:01:28 +02:00			`; RUN: opt < %s -instcombine -S > %t`
Add several more icmp simplifications. Transform signed comparisons into unsigned ones when the operands are known to have the same sign bit value. llvm-svn: 70053 2009-04-25 19:12:48 +02:00			`; RUN: not grep zext %t`
			`; RUN: not grep slt %t`
Convert all tests using TCL-style quoting to use shell-style quoting. This was done through the aid of a terrible Perl creation. I will not paste any of the horrors here. Suffice to say, it require multiple staged rounds of replacements, state carried between, and a few nested-construct-parsing hacks that I'm not proud of. It happens, by luck, to be able to deal with all the TCL-quoting patterns in evidence in the LLVM test suite. If anyone is maintaining large out-of-tree test trees, feel free to poke me and I'll send you the steps I used to convert things, as well as answer any painful questions etc. IRC works best for this type of thing I find. Once converted, switch the LLVM lit config to use ShTests the same as Clang. In addition to being able to delete large amounts of Python code from 'lit', this will also simplify the entire test suite and some of lit's architecture. Finally, the test suite runs 33% faster on Linux now. ;] For my 16-hardware-thread (2x 4-core xeon e5520): 36s -> 24s llvm-svn: 159525 2012-07-02 14:47:22 +02:00			`; RUN: grep "icmp ult" %t`
Add several more icmp simplifications. Transform signed comparisons into unsigned ones when the operands are known to have the same sign bit value. llvm-svn: 70053 2009-04-25 19:12:48 +02:00
			`; Instcombine should convert the zext+slt into a simple ult.`

			`define void @foo(double* %p) nounwind {`
			`entry:`
			`br label %bb`

			`bb:`
			`%indvar = phi i64 [ 0, %entry ], [ %indvar.next, %bb ]`
			`%t0 = and i64 %indvar, 65535`
			`%t1 = getelementptr double* %p, i64 %t0`
			`%t2 = load double* %t1, align 8`
Split the Add, Sub, and Mul instruction opcodes into separate integer and floating-point opcodes, introducing FAdd, FSub, and FMul. For now, the AsmParser, BitcodeReader, and IRBuilder all preserve backwards compatability, and the Core LLVM APIs preserve backwards compatibility for IR producers. Most front-ends won't need to change immediately. This implements the first step of the plan outlined here: http://nondot.org/sabre/LLVMNotes/IntegerOverflow.txt llvm-svn: 72897 2009-06-05 00:49:04 +02:00			`%t3 = fmul double %t2, 2.2`
Add several more icmp simplifications. Transform signed comparisons into unsigned ones when the operands are known to have the same sign bit value. llvm-svn: 70053 2009-04-25 19:12:48 +02:00			`store double %t3, double* %t1, align 8`
			`%i.04 = trunc i64 %indvar to i16`
			`%t4 = add i16 %i.04, 1`
			`%t5 = zext i16 %t4 to i32`
			`%t6 = icmp slt i32 %t5, 500`
			`%indvar.next = add i64 %indvar, 1`
			`br i1 %t6, label %bb, label %return`

			`return:`
			`ret void`
			`}`